CRC Checking, OP\ED file sorting, Crash logging

CRC Checking
can now check integrity of file transfers

Copy Mode
command line switch that makes the program copy files rather than move
them. copied files do not update the history file

OP\ED file sorting
Will detect if the file is an opening or ending song and will rename it
accordingly

Crash logging
will save a file with the traceback if an unexpected error occurs
Update README to reflect new features
Update CHANGELOG.md

reflects addition of new features
Update __init__.py

updated version
updated files to reflect new version