[UI] users filter page space after field-set.

[UI] templates button in host form.

[UI] minor fixes to reports show page

updates UI to bootstrap v2

clean up login screen

fixes #1254 - initial support to pxeboot windows

removed puppet from Gem file requirement

this commit also tries to simplify the way we use bundler, in future commits,
we should add more logic of which gems to load based on configration file.

make sure foreman doesnt blow up when running without libvirt / virt gems

ensure facts importer works correctly also when importing from a report / rake task

ensures populate hosts rake task can run correctly