Changelog for inline-c-0.5.3.1

0.5.3.1: Fix leak of FunPtr when using funCtx.
0.5.3.0: Recognize more standard library types. See pull request #19.
0.5.2.1: Convert signed char to CSChar. See pull request #18.
0.5.2.0: Make bs-ptr use char instead of unsigned char. See issue #16.