First commit to dublin branch

First commit to dublin branch

Add default branch to .gitreview
Switch sphinx theme to bootstrap with bootswatch lumen style
Reuse OPENDAYLIGHT/OPNFV side navbar templates
Remove unused options in conf.py and add the License text
Begin to use the lfit/releng global doc project template
Add TODO for guidelines on use of the new theme
Update submodule references for contributing repositories that
already have a dublin branch

Change-Id: I60c26a25bd15b90ab4878b0635ebd9b9d8712a0d
Issue-ID: DOC-467
Signed-off-by: Rich Bennett <rb2745@att.com>