fix double parsing overflow
Merge pull request #17 from Amorph/master

fix double parsing overflow
Add length argument to json_parse (allows parsing non-null terminated buffers)
Add stdlib.h include to json.h for size_t
Make initializer braces non-empty in json_parse for ISO C compliance
Replace zero-memset with zero initializer for json_state
Update README.md
Custom allocator support
Fix prototype typo in json.h (json_free should be json_value_free)
Add user data pointer for custom allocator
Fix possible out of bounds access with non-null terminated buffers
Check for _MSC_VER instead of _WIN32 when deciding whether to use
inttypes.h
Fix erroneus check against end which was preventing non-null terminated JSON strings from being parsed correctly
Merge pull request #1 from udp/master

Merge upstream changes