Bug fixes

#588554: Can't restrict access of an ubercart product
#562984: Restriction problem with Calendar module

bug report #691624 by SamSteinig: run updates through input filter so links are clickable

Better documentation, and new api function so you don't have to construct crazy URLs
Documentation on deploying on your own servelet #709260: itext servlet
Better error-reporting & fix on file-deletion (see the following bugs, all the same thing)

A few bugs were fixed.

More way to control what to show and what to hide.

Just a small bugfix release.