Fix menu inconsistencies - Chapter 7
Move the code documenting chapter up and put PHPDoc in a sub-section

There are other documentation tools out there. At the least there should be the possibility to add these.
Move Resources chapter down and split up in proper subsections
Move Communities chapter down and split up in sections
Fix two faulty internal link/title tags
Fix title documenting
Fix alignment regression
Merge pull request #495 from jrfnl/Fix-inconsistenties-in-menu

Fix inconsistenties in menu
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages