Refactored common ref blocks to partials
Fixed simple_cms_ref
minor tweaks to the SE installation guide
Merge pull request #287 from symfony-cmf/installation

minor tweaks to the SE installation guide
Merge pull request #286 from symfony-cmf/ref_partials

Refactored common ref blocks to partials
Todo for menu
Update
Rewrking menu docs
Updating menu docs
Divided and reviewed menu docs
Fixed for code review
Removed configuration for now
Removed extra line
Rewrote voters documentation
Another pass at the voters docs
Finally explained UrlPrefixVoter
Removed "we" references
Fixed references
Fixed bad references