Pulled from mike.
Merge remote-tracking branch 'seb/master'
Tested iPad upload size.
Change default file type to just be "file"
Allow user to upload a file multiple times in a row
fixed one of the audio extensions and made the delete all content button red.
Merge remote-tracking branch 'seb/master'
Merge remote-tracking branch 'mike/master'
turned browser off when app goes into background.
Added server error check on upload and got rid of lock in model.
managing branches
fixed check on slash == NULL from strchar
Mad action sheet delete all content color stay red.
added additional error checks.
Fixed minor bugs and made sure controllers got set to nil
I fixed several bugs on the browser side. Now every time you use the rename, delete, or open button, they get disabled after the action. Before you delete a file, a confirmation windows comes up. Now when a file is selected, the open button changes its label to Download, otherwise, the label is Open.