Version 0.3

A new release that fixes other bugs found through fuzzing, and adds three new functions to the API (plum_load_image_limited, plum_check_limited_image_size and plum_append_metadata).

Attached to this release are the libplum.c and libplum.h generated files. Just compile the .c file along the rest of your files and #include the .h file in your code to use the library.