Merge pull request #22 from sharoonthomas/master

Use the RTFD theme
Added text-icon toolbar image and fixed typos
Added menu creation to Hello World.

Second step of the tutorial Hello World.
Merge pull request #25 from rituparnapanda/master

Added text-icon toolbar image and fixed typos
Merge pull request #26 from rvnovaes/patch-2

Added menu creation to Hello World.
Fix some typos
flake8ify
Merge pull request #30 from param107/flake8ify

flake8ify Hello world section
Revert "Allow editing of the wiki from github"

* This reverts commit 3023c5bd8bcb4dfbfa790f2eb823f6297edec5bc.
* This code is not necessary since the rtd theme already takes care of
  this requirement in a much better way.