Updated for offline install

Issue: ascom-au/install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Removed redundant "common" package

In versions where apache2 required the commons it listed commons as
a dependency. In the later versions it actually conflicts with it.

Issue: ascom-au/install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Added GPG keys for package sources

Issue: ascom-au/install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Merge branch 'master' into install-iso#3

Issue: ascom-au/install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Removed Ubuntu sources, no longer necessary

Issue: ascom-au/install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>
Merge branch 'install-iso#3'

Issue: install-iso#3

Signed-off-by: Nathan Callister <ncallister@iwsoftware.com.au>