2 more Time service calls are RESTful (#749).

{{{
GET /time/object/{id}/created
GET /time/object/{id}/modified
}}}

Returns a topic's/association's creation and modification timestamps respectively.

BREAKING CHANGE

Time API

2 getter methods have changed signatures. Instead of an object they take a sole object ID.
{{{
long getCreationTime(DeepaMehtaObject object)     -> long getCreationTime(long objectId)
long getModificationTime(DeepaMehtaObject object) -> long getModificationTime(long objectId)
}}}

See #749.