Adds double clicking feature to separator bar
Change the license of Emperor to BSD

All files were changed to a BSD license and some functions were changed
as a consequence of this.
Adds a check to ensure separator bar does not go past limit
Merge pull request #196 from jacksonchen/Separator_doubleclick

Thanks, it works great.
Add note about parallel plots in the description

Parallel plots are now documented in the "description" section of the
documentation and include a screenshot of the Crawford dataset in
parallel display mode.
Add use of ternary operator for formatting

Using python built-in ternary operator, you can remove some unnecessary
extra lines in the code and buy a little more clarity.

Thanks @antgonza
Merge pull request #197 from ElDeveloper/to_BSD

[important] Change license of Emperor to BSD
Add Exporting and Sharing to the tutorial

The documentation now includes two new sections, one for Exporting and
one for Sharing (thanks for the suggestions @lkursell).

The Exporting tutorial includes a simple example to a command call to
inkscape that converts an SVG formatted file to a PDF.

Fixes #187
Merge pull request #198 from ElDeveloper/doc_updates

Documentation Additions