fixed comment without command

This fixes the need for a space after the issue id for executing a command including a comment only.
added name for each site configuration and use it for referencing

the motivation behind this change is, that it is not unreasonable to assume that the url will change over time, therefore it is bad for using as a reference. There is not made any changes with regard to backward compatibility, so all jobs most be updated.
added possibility to run commands silently
possibility to apply link commands silently
autocomplete on group selection
variable expansion of bundle names
possibility to run commands silently from commit message