Add keyboatd hotkeys (library, some jq extensions and hotkeys 'n' & 'ctrl+s')

refs #70
Correction of save-shortcut.

refs #70
Refactor entry-content directive and EntryController

- Should now listen properly to correct scope model changes
- Should now not be overly complicated
- Now does not take use of ng-include to partialize

refs #70
Merge pull request #71 from miphe/shortcuts

Shortcuts