Merge tag 'v1.1' into develop

Release 1.1
Expand usage help message
Remove L on CRC32 polynomial
Remove implemented in C from the readme
Allow for multiple files
Remove unneeded casting
Modularize the CRC calculation
Move fopen outside of calc function
Allow reading from stdin
Add help option
Fix bug with reading files
Update version number
Merge branch 'release/1.2'