v0.1.0, 2014-10-29 -- Initial
v0.2.0, 2014-10-30 -- Initial release
v0.3.0, 2014-10-30 -- fix a bug and output nice figure, add README
v0.4.0, 2014-10-30 -- fix a bug about input seperator
v0.5.0, 2014-10-31 -- fix a bug for python 2 and 3. Matplotlib installed from pip doesn't work.

