* Adds a new metadata helper and methods to PostPresenter to have metas on post pages.
* Adds tests to post controller to check correctness of metas
* Add methods to PersonPresenter to have metas on profile pages
* Correct meta data helper test
* Update PersonPresenter, add test to PeopleController
* Creates TagPresenter. Display tag metas on tag index page
* Updata meta data helper spec
* Not displaying bio as the description meta on profile page for now. Privacy concerns to be cleared.
* Set meta info as hashes in presenters
* Move original hardcoded metas info to config/defaults.yml
* metas_tags include by default the general metas, update views
* Update code style, clean views
* Renames TagPresenter StreamTagPresenter, updates TagController spec
* Add a default_metas entry to diaspora.yml.example
* Align metas hash in presenters, refactor meta data helper
* Use bio as description meta if user has a public profile
* Rename StreamTagPresenter to TagStreamPresenter
* Move all Diaspora-specific javascripts to app/assets/javascripts
* Move all vendored javascripts to vendor/assets/javascripts
* Add the appropriate Sprockets require directives to make sure
everything gets included in the right order
* Remove Jammit dependencies
* Fix all templates that were using Jammit's include_javascripts helper
* Add handlebars_assets gem for compiling Handlebars templates
* Move all Handlebars templates to app/assets/templates and rename
from .handlebars to .jst.hbs (this is to keep them in the same
global JST namespace that they were in under Jammit)
* Add public/assets to .gitignore since these files can and should
be re-generated by Heroku or Capistrano during each deploy
* Fix a few Handlebars templates that were looking for images in the
wrong location (I'm sure there are others, but it's late)
* Configure application.rb to precompile all javascript and css assets
that were compiled by Jammit in the Rails 3.0 code
