Fixed "Code" sections within packages.
Changed from Princial to MainPackage.
Added RHEL7 spech with deactivated mod_perl.
Switched ArticleCheckPGP.pm to the object manager.
Added Archive::Tar dependency.
Fixed uninitialized value installing a package from local
Separated fields into separate widgets to prepare for allowing ticket changes without creating articles.
Merge remote-tracking branch 'upstream/master' into otrs-master