repr for wider DataFrames
by default no effect,

set_option('print.expand_frame_repr', True) to have it print out wider DataFrames instead of just info repr.

by default uses 80 characters as the width of the line and can be set like set_option('print.line_width', 120)

also adds set_option('test.interactive', False) option for testing purposes

Travis failures unrelated.
Probably should set expand_frame_repr to True actually.
@wesm any additional thought?
 This looks great-- I'll have a look and post comments
