added uploading

prototype of embedding own content

using embed html tags

embed html added

associated channel with file to limit file view based on channel subscription. unrelated: linked admin to dropdown menus

added some tests for File
returning json. will probably have create make it a class view and override dispatch. right now, its showing json values for ALL file locations on the same page
changed from function based view to class based view. overode dispatch method to only show json data from selected page

added tests

added link tag to header

squashed commits