Reworked the content model and separated content from the page, renaming of the PageModel object remains
Merge pull request #87 from brickpile/sidetrack

Reworked the content model and separated content from the page, renaming...
Removed cancel button in asset manager upload and added dialog close event on body click
Fixed issue with body click
Added browse for files in upload dialog
Changed position of asset manager dialog
Added automatic upload when adding files in the asset manager
Added infinite scroll to asset manager and fixed issue #85
merged changes