Use rapi_error_t in rapi_bwa.c
Backtrack to BWA 0.7.8
Extract BWA information directly from BWA code

Previously I had simply copied the required function prototypes into the
rapi_bwa code, which doesn't work to help track changes in the
underlying BWA code base.
Handle comments on same line as function declaration
Move batch capacity fn to rapi.h
Move implementation of rapi_get_rlen out of header
fix error check
Enable all compilation warnings
Expose alignment function through pyrapi
Fix align.py
Update rapi_test.c
Add example to build actions in main Makefile
Add .gitignore file
Move setup_bwa.sh to rapi_bwa directory