v0.2.2: Version 0.2.2. More fixes.

Lots of changes.

• Fixed Coveralls, nosetests.
• Changed k-means clustering to use larger values of k in squared steps, e.g. 4, 9, 16, 25.
• k_range argument passed to clustering functions is now k_vals since it now accepts lists of values rather than just start and end values for a range.
• Changed Pandas data frame sort methods from df.sort() to either df.sort_index() or df.sort_values(by='colname').
• Updated README.md.

v0.2.1: Version 0.2.1. Minor fixes.

Updated README.md with info. on PhantomJS dependency. Other minor fixes.

v0.2.0

Version 0.2.0. Adds Travis CI, Coveralls, fixes for box plots and hea…

v0.1.2

Added some categories to setup.py

v0.1.1

Fixes dots_backend __init__.py bug

v0.1.0

Adding new tag. v0.1.0 rather than 0.1.0