Forced encodes the file in utf-8 for python 3
Minor doc fix.
Additional tests for cell selection.
Fixed invalid string formatting resulted in misleading stacktrace
Merge pull request #21 from kindkaktus/master

Fixed invalid string formatting resulted in misleading stacktrace.
Additional fixes for data types in warnings.
Add example program input to Manifest. Closes #14.
Merge pull request #15 from shadchin/master

Fix for python 3
Reduced documentation size in release tarball. Fixes #19.
Prep for release 0.3.3
Add smooth option to series
Support same subtypes in chart_line as in chart_scatter
Restructed doc layout to avoid duplication of images in build.
Added chart axis font rotation.
Added test for 0 data in Worksheet Tables.
Fixes for PEP8 formatting.
Added tests for smoothed charts.
Additional test for smoothed charts.
Changes for smooth scatter and line plots
PEP8 formatting changes