Moved create_empty_channel to Util module. Changed empty channel from - to NUL. Expanded channel definition

Added ability to except 3 character channels, and to automatically pad out to 4 channels,  if less then 4 channels are present.

Changed url code to use timeseriesfactory, removed unused write_file function, added post_process function

cleaned up a few things, simplified ness_parser byte swapping code, changed a few names, moved data scale and shift into post_process