Changed required execution environment to Java 7

Change-Id: Id2037e2ab5ead3660f84b5dc742a9328af53eccc
Updated vendor information.

Change-Id: I5cbe235ac62ee92b9b74583ab16e7278e2432290
Fixed an issue with merge() and unmodifiable PropertySets.

Change-Id: I84549088cc4c005847291eb80358c3c48327e0eb
Support for non-bean-style methods as getters and setters for properties.

Change-Id: Ifca005e2eab6d0aa7f1ff2baf7bc1767d48b6f44
Implemented method chaining for object property mappings

Change-Id: I74640da76a9daa45e1ee0f4e693f876879bc7914
Fixed merge method for properties of type long or double.

Change-Id: I036be049a9b8b22e23bc8f9790d056e4ecb3993f