Fixed memory corruption issue in bsarch

Allocated memory in bsarch was not being zeroed (this could be an issue in the way I compile bsarch), this is now fixed. Also added a test for FO4 DDS.

User pointer / context for FO4 DDS info callback

You can now set which data you want to be passed along when the FO4 DDS callback is called using the bsa_file_dds_info_callback_set's last argument. This is useful if you want to map between absolute paths on disk and relative paths inside the archive. Any kind of data can be passed (void*).

Add files from any source path

bsa_add_file_from_disk is now bsa_add_file_from_disk_root (please change your code accordingly)
bsa_add_file_from_disk can now be used to add files from any source path. See libbsarch-visualstudio-test.cpp for an example.
Fixed issues with using libbsarch with GCC

Fixed access violation while extracting

Fixed issue with releasing file buffer result causing access violation while extracting

Exception handling

Added exception handling. Should be more reliable.

Experimental for testing

Most functions should now work. Still have to test the file iterator function.

Experimental for testing

0.0.1

Update README.md