Tippecanoe-decode and tippecanoe-overzoom changes to improve binning performance (#292)

* Add a tippecanoe-decode option to restrict which attributes to decode

* Plumb buffer and feature limit around

* Check the feature limit

* Clarifying cases where output detail can be unspecified

* Clip bins to the tile buffer instead of just passing them through

* Add missing include

* Missed some tests

* Add --no-tile-compression option to tippecanoe-overzoom

* Update version and changelog

mvt.hpp

@@ -9,6 +9,7 @@
 #include <vector>
 #include <optional>
 #include <memory>
+#include <cmath>
 
 #include "errors.hpp"
 #include "text.hpp"
@@ -201,6 +202,10 @@ struct mvt_layer {
 	// For tracking the key-value constants already used in this layer
 	std::vector<ssize_t> key_dedup = std::vector<ssize_t>(65536, -1);
 	std::vector<ssize_t> value_dedup = std::vector<ssize_t>(65536, -1);
+
+	int detail() const {
+		return std::round(std::log(extent) / std::log(2));
+	}
 };
 
 struct mvt_tile {