Add Travis-CI testing support

(cherry picked from commit e9224a7a7322bd828539b25b1d4a08c60b8fa9ae)
Rename /etc/rsyslog.d/10-crowbar-client.conf to 99-crowbar-client.conf

We want this to be the last config file; for instance, this should be
included after 11-swift.conf. Of course, we could rename 11-swift.conf,
but there might be other files.

(cherry picked from commit 293f7cd066472343d092b8f69ae6f384b561f2ba)
Merge pull request #94 from dirkmueller/release/stoney/master

Rename /etc/rsyslog.d/10-crowbar-client.conf to 99-crowbar-client.conf
Fixed raw/custom proposal links
Cleaned crowbar config and added travis image to readme

The goal is to remove the package requirements from the crowbar
configuration as the dev tool and all the dependencies for building isos
on the dell way is not maintained anymore and move the packaging to obs
instead.
Added ruby 2.1.0 to travis config