log to server when submission does not pass check and returns 500
comment out unused code for updating number of forms, also removes issue #202
add error logging if submission response from OpenRosa server is not 201 or 202
edit ad, fixes issue with queue square shown on preview, fixes error when preview is loaded without form parameter
added tolerance for OpenRosa servers that do not respond with X-Openrosa-Accept-Content-Length header
fixes issue with previews that do not have form parameter, edited ad
Revert "fixes issue with previews that do not have form parameter, edited ad"

This reverts commit 5522d84aca3b78c2dd30c82c279c98797e8b66bb.
change the way context is passed between manifest and other controllers to fix bug with authenticated forms and manifest creation
hide offline-enabled icon if there are errors during appCache updates or initialization, closes https://github.com/modilabs/enketo/issues/606
changed logic to determine trusted server
force cache update
Merge pull request #608 from MartijnR/master

a whole bunch of fixes for authentication, misbehaving servers, and preview view