Merge pull request #323 from euanh/build-improvements

Build improvements
URL based install - fix missing RPMS

Always create the directories
Merge pull request #325 from matelakat/ubuntu-without-rpm-dirs

URL based install - fix missing RPMS
SPECS: Libraries should be in the group 'Develepment/Libraries'

rpmlint objects to the group 'Development/Other'

Signed-off-by: Euan Harris <euan.harris@citrix.com>