Expose license type as a config key.

Defaults to 'development'. Override with property

brooklyn.marklogic.license-type=evaluation
Make create_database.txt way more readable.
Ensure created forests and databases are managed
Miscellaneous tidies
Replace logback-default with logback-custom.

Delete overriding logback-test. Quieten down jclouds.
Explain use of setAttribute and setConfig on Forest interface

Remove implementations from ForestImpl
Remove mentions of ec2-user as login user from tests
Forests and Databases are iterable

Iterator returns children that are instances of Forest and Database
respectively. Removed asList() from Forest interface.
Set a node's NodeType to that of its owning group
MarkLogicGroup is Iterable<MarkLogicNode>

Simplifies several methods in MarkLogicGroupImpl
Fix class name in start-ec2.sh script
Switch ForestImpl.awaitStatus to use Repeater
Marklogic -> MarkLogic
Use enable/disableForest methods, rather than enable(boolean enabled).
RendererHint on MarkLogicNodeImpl.URL