Asset pipeline support, small theme change required [THEME] [DEPLOY]

It should now be possible to develop themes which take advantage of the
asset pipeline for non-view resources such as stylesheets using SASS/SCSS
or javascript using CoffeeScript (add to :assets group in Gemfile).

[THEME] If you are maintaining a theme or fork of calagator, you will
need to make a small change to your templates, due to incompatibilities
between the asset pipeline and the ':cache => true' attribute.

  1. Change following line in themes/*/views/layouts/application.html.erb:
       <%= javascript_include_tag  :defaults, :cache => true %>
     to look like:
       <%= javascript_include_tag 'application' %>

  2. Remove any additional ':cache => true' attributes used in your
     theme; most likely you won't find any beyond #1 above.

[DEPLOY] Deploying calagator now requires you to precompile assets using:

  $> rake assets:precompile

Conflicts:
	config/environments/development.rb
Ignore .sass-cache/
Upgrade safe_yaml gem, install javascript runtime for rails admin

The version of safe_yaml being referenced in the Gemfile.lock (0.9.2)
no longer exists on rubygems, likely due to a security vulnerability.

RailsAdmin includes some CoffeeScript assets which requires a javascript
runtime in order to translate/compile correctly.  Using 'therubyracer' for
now which uses Google's V8 javascript engine.
Update 'activate' theme so it works with the asset pipeline
remove IE{6,7} CSS customizations, we can't test and usage is low
Take advantage of asset pipeline for some core assets [THEME] [DEPLOY]

Removed some core assets (jquery, jquery-ui, formtastic) that are
automatically provided by gems; before the asset pipeline, assets had to be
copied across to the project directory by hand or via *:install rake tasks.

Removed some assets that didn't appear to be used by anything such as
reset-fonts-grids.css, jquery.dimensions.min.js.

[THEME] The 'reset' stylesheet was moved to core, it is unlikely you would
need or want to update this manually.  'common' and 'formtastic' core
stylesheets have been merged into the 'application' stylesheet.

  Change the following lines in themes/*/views/layouts/application.html.erb:
    <%= theme_stylesheet_link_tag 'reset', :media => :all %>
    <%= stylesheet_link_tag 'common', 'formtastic', :media => :all %>
  to look like:
    <%= stylesheet_link_tag 'application', :media => :all %>

Conflicts:
	app/assets/javascripts/jquery-ui.js
	app/assets/javascripts/jquery-ui.min.js
	app/assets/javascripts/jquery.js
	app/assets/javascripts/jquery.min.js
	app/assets/javascripts/jquery_ujs.js
Update INSTALL.md so precompile commands are on two lines
Update 'activate' theme to be inline with upstream changes
Remove more IE6/7 hacks, finally get asset uglification working
Include updates to Gemfile.lock triggered by calagator uglifier merge
Copy themes to public/ when doing an assets:precompile

In theory, this would make it so a deploy to heroku would also copy
over theme files automatically.
Upgraded to latest fullcalendar js/css

 - The previous fullcalendar version was over a year old, and appeared to be
   incompatible with the javascripts used by Activate.
 - Adding fullcalendar.js (assuming we may want it for future
   development work).
Now OK to run assets:precompile more than once.
adding better_errors for better web debugging
Include updates to Gemfile.lock as result of Gemfile update