Copied from bitsync folder with latest secret from 2014-04-15 - AMJ
I think just one change by Jack, adding printer = tweaks.printer to init. - AMJ
Bug in fitting fixed. Statistical errors are now displayed correctly. - AMJ
.pyc's added to .gitignore.
Added file with new databox class.  TODO: replace appropriate part of spinmob code and test.
Minor spacing and spelling correction to _data_types.py.  Added a simple data set for testing of the databox class, along with a program to test _data_type.py.