Merge pull request #30 from andrenarchy/master

Only print info when show_info==True
Fix brackets in print statement

Fixes issue #31. Thanks to alexeyegorov
Add opacity to _draw_line2d.
Merge pull request #32 from placasse/placasse/opacity

Add opacity to _draw_line2d.
add newline after all data entries
allow commas in legend entries
Merge pull request #33 from skoslowski/legend_fix

allow commas in legend entries
add 'figure' argument
fix handling of 'extra' set
Merge pull request #36 from andrenarchy/gcf

add 'figure' argument
updated copyright year
substantial pep8 cleanup
another pep8 bug hunt
properly treat exceptions in tests
add requirements file for readthedocs
mock matplotlib
add mock to requirements
remove matplotlib from requirements (should be on system)
move import of transforms into function
punctuation for types