Removes the inflection of the acronym "API"

Host applications that have their own API controllers may not have
chosen to inflect "api" to "API"

In that scenario, simply including the CASino Engine into that application
will cause the entire app to "blow up".

In accordance with the "Principle of least astonishment", CASino should not
mandate how certain words are inflected unless they are entirely unique to
CASino.

* Removes the inflection rule for the API acronym

* Renames the few classes/modules that live within that namespace

* Aliases the "Api" namespace to "API" for applications that *have* chosen
  to inflect "api" to "API"
Merge pull request #28 from dlindahl/features/remove_api_inflection

Removes the inflection of the acronym "API"
Removes inflection acronym (#28 continued)

I missed another inflection acronym definition for "API"
Removes jQuery and CoffeeScript dependencies

jQuery Rails is now at v3, so forcing a lower version means that some
users will run into dependency conflicts when installing CASino
(especially Rails 4 users)

Additionally, not only do some users not use (or want) jQuery or
CoffeeScript in their application, CASino isn't using that much
CoffeeScript to necessitate pulling in all of jQuery or requiring
CoffeeScript.

This updates the javascript in two ways:

* Replaces the auto-focusing of CASino elements with the `autofocus`
  HTML5 attribute

* Replaces the jQuery-specific javascript that automatically logs a
  user in when a TGT is already present with native DOM calls inlined
  directly in the login form so that it is always present, regardless
  of how the parent application has configured its layouts.

* Rewrites the CoffeeScript source into JavaScript
Removes explicit YAML engine declaration
Merge pull request #29 from dlindahl/features/remove_more_inflections

Removes additional inflection acronym (#28 continued)
Merge pull request #30 from dlindahl/features/dont_set_yaml_engine

Don't override Ruby's YAML Engine
Merge pull request #27 from dlindahl/features/remove_jquery_dependency

Removes jQuery dependency
Make cookie check work again
Merge branch 'release/2.0'
Fix extra attributes with string keys
Bump version [ci skip]
Avoid global namespace lookup
Fix typo /cc @dlindahl
Add a favicon, fixes #9
Add support for relogo (http://relogo.org/)
Fix disabling two-factor authenticators, fixes #31
Fix session deletion
Merge pull request #33 from rbCAS/31-remove-ujs-dependency

Fix for #31: Remove jQuery-ujs dependency
Include issuer in otpauth url