Added freq_adj

Frequency adjustment is now added. This supports both + and -
adjustments.
Bug fixes and main function

Several bug fixes regarding when the serial ports open. Also
implemented the config script on the serial address and the program
path.
get_offset function added
main function, config updated, get_offset

hipat_reference now part of config file. get_offset function was added
here.
Bug fixes config.py and crtc.py

Added commas to config.py to seperate the lines. changed the way crtc
called serial functions in main.
Small optimizations

Reduced sleep between character write, added comments.