userportal, webadmin: remove PatternFly from source tree

*NOTE:* after this commit, developers must install the PatternFly RPM
dependency, or the web UI will be severely broken.

Remove PatternFly dependency from source tree.

Symlink ovirt.brand to PatternFly installation at
/usr/share/patternfly1/resources.

Create patternfly-ovirt.css that contains ovirt's customizations of
PatternFly classes.

Change-Id: I1da6bece78951a98be148050078c6d8201018273
Signed-off-by: Greg Sheremeta <gshereme@redhat.com>