adds ajax indicator toggle code for jquery to make up for different ajax transports
remove obsolete prototype indicator code, as the jquery one seems to work better
Revert "remove obsolete prototype indicator code, as the jquery one seems to work better"

I revert this for now until we are sure there will be no problems with this code.

This reverts commit 58dba65d36c8bedb1008714c132f99e45335fc36.
comment.
Merge remote-tracking branch 'origin/feature/rails3' into feature/jquery-ajax-indicator

Conflicts:
	app/assets/javascripts/application.js
Merge pull request #120 from opf/feature/jquery-ajax-indicator

Feature/jquery ajax indicator