Initial import.
Add support for some of Pygments' options.

- Register "code", "code-block", "sourcecode" & "sourcecode-block" as
  aliases to the same directive.
- Rewrite the "pygments_directive" function as a class (Pygments).
- Create a new formatter each time. It takes more time to format the
  document because of that, BUT :
- Add support for some of Pygment's formatting options :
  * linenos (as a flag)
  * hl_lines
  * linenostart
  * linenostep
  * linenospecial
  * nobackground (as a flag)
  * anchorlinenos (as a flag)
  * noclasses (as a flag)
(Reverse) updated with content of http://kib2.alwaysdata.net/GEdit/reStPlugin.zip
Make the plugin work with Gnome3 (specifically 3.8.3)

Just lightly tested. Please, file any bugs to the Issue Tracker.
Add rst.lang from the master of gtksourceview.

For those who don't have the latest and greatest git-build yet.
Spelling fixes
Update the installation instructions to the reality.
Why in the world we should create a random HTML in a random location?