Merge the RTD & user Google Analytics snippets

Based on https://developers.google.com/analytics/devguides/collection/gajs/#MultipleCommands

Fixes rtfd/readthedocs.org#723.
Fabric docs now live at fabric-docs.rtfd not fabric.rtfd.

Sorry! Figure best to keep examples reflecting reality...
Small doc index changes
Fix encoding
Remove Chef cookbooks to avoid confusion with other deploy code.
Merge pull request #775 from nZac/remove-chef

Remove Chef cookbooks to avoid confusion with other deploy code.
Merge pull request #770 from bitprophet/fabric-example-subdomain-update

Fabric docs now live at fabric-docs.rtfd not fabric.rtfd.
Reorganized README to help beginners.
Merge pull request #778 from nZac/update-readme

Reorganized README to help beginners.
Update nginx to redirect subprojects
Symlink underscore and dash verisons
redirect subprojects on CNAMEs too
Add docs badge
Build the version and latest on active default branches.
Fix initial migrate bug

 * Fix the installed apps order to fix the missing projects table error
   when doing initial migration
Merge pull request #780 from cheeming/fix-installed-apps-order

Fix initial migrate bug
Fixup Sphinx doc link.
Merge pull request #782 from Lukasa/master

Broken 'More info' link
Merge pull request #760 from malept/merge-google-analytics-tags

Merge the RTD & user Google Analytics snippets
Strip trailing whitespace