Drop or coalesce points too when dropping or coalescing smallest (#6)

* Handle points too when dropping or coalescing the "smallest" features.

* Add statistics of tile size reduction strategies to tileset metadata

* Update changelog and version

* Update documentation

tests/muni/out/-Z11_-z11_-g2.json

@@ -8,6 +8,7 @@
 "maxzoom": "11",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z11_-g2.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_gamma\": 1674 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-B15.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-B15.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 4727 }, { \"dropped_by_rate\": 4642 }, { \"dropped_by_rate\": 4209 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-Bf2000.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-Bf2000.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 2910 }, {  }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-M10000.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-M10000.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 18540, \"detail_reduced\": 4 }, { \"dropped_by_rate\": 6390, \"detail_reduced\": 3 }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-M10000_-aG.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-M10000_-aG.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 18540, \"dropped_by_gamma\": 65, \"detail_reduced\": 4 }, { \"dropped_by_rate\": 5251, \"dropped_by_gamma\": 155, \"detail_reduced\": 2 }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-M10000_-ad.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-M10000_-ad.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 4080, \"dropped_as_needed\": 107 }, { \"dropped_by_rate\": 2973, \"dropped_as_needed\": 232 }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-M10000_-pd.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-M10000_-pd.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 7695, \"dropped_as_needed\": 93 }, { \"dropped_by_rate\": 4112, \"dropped_as_needed\": 87 }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-M5000_-as.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-M5000_-as.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 4080, \"dropped_as_needed\": 488 }, { \"dropped_by_rate\": 2973, \"dropped_as_needed\": 1306 }, { \"dropped_as_needed\": 3030 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-O100_--cluster-densest-as-needed.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-O100_--cluster-densest-as-needed.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 4080, \"coalesced_as_needed\": 662 }, { \"dropped_by_rate\": 2973, \"coalesced_as_needed\": 1747 }, { \"coalesced_as_needed\": 4342 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-rf2000.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 2542 }, { \"dropped_by_rate\": 1546 }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-rf2000_-Bg.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000_-Bg.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 2546 }, {  }, {  } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-Z11_-z13_-rf2000_-g2.json

@@ -8,6 +8,7 @@
 "maxzoom": "13",
 "minzoom": "11",
 "name": "tests/muni/out/-Z11_-z13_-rf2000_-g2.json.check.mbtiles",
+"strategies": "[ {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, {  }, { \"dropped_by_rate\": 1349, \"dropped_by_gamma\": 963 }, { \"dropped_by_rate\": 747, \"dropped_by_gamma\": 753 }, { \"dropped_by_gamma\": 513 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [

tests/muni/out/-r1_-K20.json

@@ -8,6 +8,7 @@
 "maxzoom": "14",
 "minzoom": "0",
 "name": "tests/muni/out/-r1_-K20.json.check.mbtiles",
+"strategies": "[ { \"coalesced_as_needed\": 4608 }, { \"coalesced_as_needed\": 4608 }, { \"coalesced_as_needed\": 4608 }, { \"coalesced_as_needed\": 4608 }, { \"coalesced_as_needed\": 4608 }, { \"coalesced_as_needed\": 4607 }, { \"coalesced_as_needed\": 4607 }, { \"coalesced_as_needed\": 4606 }, { \"coalesced_as_needed\": 6005 }, { \"coalesced_as_needed\": 5393 }, { \"coalesced_as_needed\": 5012 }, { \"coalesced_as_needed\": 4727 }, { \"coalesced_as_needed\": 4576 }, { \"coalesced_as_needed\": 4003 }, { \"coalesced_as_needed\": 3002 } ]",
 "type": "overlay",
 "version": "2"
 }, "features": [