* Change JSON objects to a union type to use less memory
* Stop storing the string representation of JSON numbers
* Restore the ability to create features with large integer attributes
* Make sure large-integer feature IDs still behave as before
* Add missing #include
* Don't preallocate as much space for arrays and objects
* Treat inability to check free disk space as a warning, not an error
* Update changelog and version
https://github.com/miloyip/dtoa-benchmark/issues/7
commit fe550f38669fe0f488926c1ef0feb6c101f586d6
Author: Eli Fidler <efidler@topologyinc.com>
Date: Tue May 31 11:51:37 2016 -0400
avoid array index out-of-bounds
UBSAN gave "runtime error: index 13 out of bounds for type 'const uint32_t [10]'"