Merge pull request #3 from stianst/idm-tmp

Load CDI extensions from core module
Removing the relationships domain model element related classes. Added supportsAll configuration for features.
Adde file based store configuration support.
Added ldap based store configuration support.
Added test case for the idm using CDI qualifiers to inject the IdentityManager instances.
PicketLink IDM configuration/usage for CDI applications.
Changing the IDM subsystem to handle the IdentityManagerFactory instead of the IdentityManager.
Merge pull request #4 from pedroigor/master

Pushing idm branch changes to master
Updating project version to 3.0.0-SNAPSHOT
Merge remote-tracking branch 'upstream/master'
Changing license, build configuration, README.
Changing README
Changing README
Changing README
Changing PicketLink Modules organization.
Updating README
Renaming the identity-management@jndi-url to jndi-name.
Installing the IdentityManager for each configured realm.
Installing the IdentityManager for each configured realm.
Merge branch 'master' of github.com:pedroigor/picketlink-as-subsystem