add page title to kuhsaft pages

@effkay 

- added a page title for browser title display (seo stuff)
- better translation is welcome ('Seitentitel (im Browser)' may not be optimal)
- removed gem dependency lock on 'rspec-rails' since bundler was failing (or was i failing?)

pls review

i'd like this as a 1.8.2 release to integrate into panorama_web (when its passed + merged I'm gonna need help releasing the stuff)


thx + regards