Adding checks for dotlrn-wide admin. For .LRN 2.2 we'll want to move these into a separate dotlrn-admin package to ensure correct permission checks for all files in this directory.
I18N: merging many one word messages into messages containing phrases to make translation to languages such as finnish easier (for example, finnish doesn't have prepositions). For the en_US messages I have decided to keep the reuse of pretty names of classes, departments etc. inside other messages. This reuse is optional though and will not be appropriate for some languages (such as finnish).