Revert all changes/commits done to replace smjansson with EasyJson

This commit reverts the following commits:

e778e8500e3fd5b3c6c93624c63b87bccf8d47d9 - Editor_SavePlayerModelAttributes: Fixed more json errors
eab6539bb5f31a9b091b6e322c74abcd2bd02080 - Fix error when saving in store_editor
180d0cd6d3e62030eea6f5ac3236f5fa6851094c - Initial impl of native json parsing, notes are as follows:

Conflicts:
	scripting/store-equipment.sp