Initialise get_ptw_frame
Merge branch 'master' into get_ptw_frame
Fixed the multiple typedef the proper way, with #ifndef
Merge branch 'master' into get_ptw_frame
done sanity checks and and memory allocation in get_ptw_frame
added write_info test to Makefile
get_ptw_file should now work
wrote get_data test
fixed an incorrect sign causing us to skip not enough frame header information
separated out endianness header
removed pointless file order_check.h
changed names of functions for consistency
merge get_ptw_frame in master