add helpers for default meta tags
Merge remote-tracking branch 'sampriti/optimization' into adding-meta-tags

* sampriti/optimization:
  Removed Unnecessary tags
  Added Placeholder meta tags. real content to be added later.
implemented meta tags
Ping to Thomas, revised meta tags
started wit helper-specs for the metatags. Added screenshot img
added helper specs for application_helper
add viewspecs for application.html.erb
Merge pull request #348 from yggie/adding-meta-tags

Adding meta tags