pulls friends UI out into separate library
Adds PHP 5.5 to Travis config
Merge pull request #5656 from Srokap/travis_php55

Adds PHP 5.5 to Travis config
added friends lib
namespaced friends functions
Fixes #5642 all actions pass through walled garden
moved notification user setting code from action to function
made user settings form sticky
Fixes #4744 removes foaf viewtype (moved to semantic_web plugin)
extra tabs unnecessary and adds extra indent to first lines of head and body
Fixes #4743 removes ical support - now in data_views plugin
Merge pull request #5651 from cash/friends_lib

pulls friends UI out into separate library
Fixes #5657 removes Elgg release number for html head
powered by looked silly when it was in footer default with other menu items - moved to its own spot
using database object for sanitizing - better for unit tests because can be mocked
removed all the comments from using phpmyadmin to do an export of schema - let's not do that again