Update nzbget-testing url

Closes #1015.
Fix ruby native compile

Broken by 47c63baae001fb37956f7a254136877cb4f9cd73
Set minimum Python version for Mercurial
Minimize package sizes by skipping git history
- CouchPotato, Headphones, XDM
Remove unneeded files in evansport toolchains
Remove unneeded nodejs dir
Add comcerto toolchain
Set minimum firmware version for ejabberd
Correct comcerto2k arch name
Add $(SUPPORTURL) to build to create 'support_url=' entry in INFO file of package.
This allows a support URL to be specified in the Makefile for a package using the variable: '$(SUPPORTURL)' which is then added to the package's INFO file. This will then display a support link in the DSM Package Center.
Merge branch 'master' into gentoo-chroot