Major refactor or authorization and token requests

* Untangles AuthorizationEndpoint and changed UserApprovalHandler to use
two methods for the two different situations during which it is called
* Replaces AuthorizationRequest with OAuth2Request
* Moved validateScope into its own interface, with a default implementation
Updated samples to reflect auth request changes.
Refactored request lifecycle

Refactored AuthorizationRequest into three distinct classes,
AuthorizationRequest, StoredRequest, and TokenRequest.
Removed AuthorizationRequestHolder, now storing
OAuth2Authentication everywhere.

(Squashed pull request #79 by aanganes)
StoredOAuth2Request -> OAuth2Request
Tidy names and interfaces
Tidy up a few things related to *Request

- OAuth2Request is now immutable from the point of view of clients
(it still has setters but they are protected)
- OAuth2RequestFactory has overloaded methods (instead of method names
that refect the parameters)
- OAuth2RequestFactory.createTokenRequest for the implicit grant
explicitly requires the grant type to be provided
- Cleaned up some copyright notices
- Removed or fixed some TODO/FIXME comments
Add ClientDetails to some method signatures where it is clearly always available
Refactored OAuth2Request, AuthorizationRequest, and TokenRequest

...into a flatter heirarchy
Merge feature authrequest: major overhaul of AuthorizationRequest
Remove broken links from docs and pull in some changes from wiki
Fix milestone profile
[maven-release-plugin] prepare release 1.1.0.M1
[maven-release-plugin] prepare for next development iteration
Sync docs from master branch to docs gh-pages directory
Create SubdomainRedirectResolver

there are cases where the redirect-uri consists of a subdomain, and
each customer has its own subdomain, hence a different redirect-uri.
So we need a resolver that will validate the URL not as the default
impl (that checks startsWith() ), but something that will check only
the suffix of the context path.
Merge SubdomainRedirectResolver into DefaultRedirectResolver
Added responseTypes parameter to OAuth2Request
AuthorizationRequest.createOAuth2Request mistakenly populated the requestParameters map with the approvalParameters map. Fixed method to use correct map.
Added ImplicitGrantService, mimics the AuthorizationCodeService pattern

AuthorizationCodeService pattern is used by the code flow. This change
allows the  ImplicitTokenGranter to retrieve the original AuthorizationRequest,
using the incoming TokenRequest as a key.
Compiler warnings