Fixes hardcoded version in Acorn cask
Changes version of Cura
Removes Eggscellent cask

The Eggscellent is not accessible on Amazon any more . The App is AppStore only now
Updates version for Transmission
Has of Firefox Aurora changed
Removes fuzzy-clock

Homepage and download url do not exist any more
Removes hash from Integrity
Adds new version of HipChat
Fixes changed hash in GnuCash
Fixing HoudahGeo cask
Merge pull request #642 from shostakovich/fixes_for_broken_casks

Fixes for broken casks