Allows for compilation with CMake on macOS

Json object set xxx

fixed wrong object name in json_object_all_values_equal

Support for 64 bit pointers on Windows

Removes me as Win32 maintainer, because I'm not.

Updates README-WIN32.html to remove my status as a maintainer (I'm not). Also removes ancient porting notes and adds a reference to json_config.h.win32 which is where most folks should go to start with Windows issues.

Also correct a couple of calls to _to_json_string to check the return value.

Conflicts:
	tests/test_util_file.c

Adding a file for EditorConfig

Also undo NULL check in json_tokener_set_flags(): it's not at all valid toi
 try to set flags on a NULL pointer, and doing so should not be silently
 ignored.

Minor changes in C source code

Very minor changes not related to C source code

Conflicts:
	tests/test_util_file.c

Adding a test with cppcheck for Travis CI

Improving README

Improving .gitignore