Merge pull request #148 from dietmaroc/patch-1

Update theming.rst
Update theming.rst

Double word eliniated: ... due to an an upgrade -> due to an upgrade
Merge pull request #149 from dietmaroc/patch-2

Update theming.rst
Merge pull request #147 from j-ed/stable5

added link to custom_mount_configuration_gui.rst
Update CONTRIBUTING.rst
Update README.rst
Update update.rst

Remove upgrade warning regarding encryption app.
UCS: since UCS 3.1 all prerequistes are given, nothing to do
UCS: UCR Intro up to date, update UCR table with new options
UCS: update installation procedure and postconfig
Explain Proper Windows IIS Verb Handling

Fixes #142
Fix formatting
Mention davs in nautilus

I actually made this the default assumption (as should be) and
described dav:// as a backup solution.

Fixes #132
Changes related to Google Drive SDK migration
Merge pull request #154 from owncloud/googledrive

Changes related to Google Drive SDK migration
Add detailed descriptions for configuring Dropbox and Google Drive
Fix Formatting
UCS: More details about install via AppCenter
UCS: Reinstall instructions
Merge branch 's5-ucs' into stable5