Added Flask-misaka extension for markup
Added default-theme template changes
Added testcase: markdown support
Fixed bad submodule ref
Changed references to HTML as valid in long_description. Markdown instead
Modified long_description examples used in tests, now Markdown and not HTML
Updated default-theme ref
Fixed issue with old html long_description missed in test
Updated default-theme submodule ref
Merge branch 'master' into markdown-long-description-issue-684

Conflicts:
	pybossa/themes/default
Updated submodule ref
Merge branch 'markdown-long-description-issue-684' of https://github.com/PyBossa/pybossa into markdown-long-description-issue-684

* 'markdown-long-description-issue-684' of https://github.com/PyBossa/pybossa: (38 commits)
  Update documentation as we are now enabling the CACHE
  New fixes in redis cookbook. Closes #708
  New improvements for Vagrant
  Changed subproject ref after merging branch at PyBossa/pybossa-default-theme
  Remove commented out code.
  test
  test
  Place featured in the first posion.
  modified revision history
  Comment out prints
  Changed submodule
  trick
  Added migration script
  Update documentation
  Unwire apps_per_page and make it an option in the settings. Closes #681
  Fix missing category
  Revert
  Add 20 featured apps to front page.
  Fix get_featured (category arg removed).
  Pass 20 apps per category to front page.
  ...

Conflicts:
	pybossa/themes/default
Merge pull request #702 from PyBossa/markdown-long-description-issue-684

Markdown long description closes #684