Cleaned up pieces of content management API, and added local commands.
Cleaned up pieces of content management API, and added local commands.

benjaoming/kolibri,christianmemije/kolibri,jonboiser/kolibri,rtibbles/kolibri,DXCanas/kolibri,learningequality/kolibri,lyw07/kolibri,christianmemije/kolibri,aronasorman/kolibri,lyw07/kolibri,mrpau/kolibri,jamalex/kolibri,aronasorman/kolibri,DXCanas/kolibri,rtibbles/kolibri,christianmemije/kolibri,aronasorman/kolibri,jonboiser/kolibri,christianmemije/kolibri,jtamiace/kolibri,lyw07/kolibri,indirectlylit/kolibri,mrpau/kolibri,benjaoming/kolibri,DXCanas/kolibri,MingDai/kolibri,jonboiser/kolibri,indirectlylit/kolibri,rtibbles/kolibri,learningequality/kolibri,jayoshih/kolibri,jtamiace/kolibri,MingDai/kolibri,MingDai/kolibri,MingDai/kolibri,indirectlylit/kolibri,jtamiace/kolibri,mrpau/kolibri,jayoshih/kolibri,jayoshih/kolibri,benjaoming/kolibri,rtibbles/kolibri,aronasorman/kolibri,jayoshih/kolibri,learningequality/kolibri,lyw07/kolibri,mrpau/kolibri,jonboiser/kolibri,DXCanas/kolibri,benjaoming/kolibri,jtamiace/kolibri,indirectlylit/kolibri,jamalex/kolibri,jamalex/kolibri,learningequality/kolibri,jamalex/kolibri