[add] shared method to get template snippet strings, that the app do not rely only on call_user_func
Merge branch 'development' into dev/templatesystem
[mod] clean up the chrome layout
[mod] enable theme cascading (user -> parent -> default) and template snippet files in theme folder under templates/*.mustache
[add] box template snippet file in default theme folder
[mod] rename public folder
[fix] change flickr to https addresses
[rem] remove gowalla service as this web service is closed
[mod] improve box template
[add] replace column pattern/template by containers because they do not have to be rendered as columns
[mod] improve box template and add example for service (text) box template
[mod] insert example templates and remove them from the old template functions
[mod] remove populateItem/Box calls b/c this can be done earlier via filters now
[mod] removed template functions api as this is done by dedicated templates now
[add] replace index php template by mustache template