Changed required execution environment to Java 7

Change-Id: I5669947323296afa5a9a96d13ec2f86071690bc9
Updated vendor information.

Change-Id: Ida69f18e47f7a3147b596b57ecb15938e8f2a55d
Allow to directly create rdfs:Class as child of owl:Class.

Change-Id: I81b3b9f5a5d0acf2d78d2bbf1cfc6f2d3801290b
Removed ICollector.done().

Change-Id: Ic6846201e80792a568e7bc101821b6606a86d736
Add required dependency to Guice.

Change-Id: I812fda7ee3c5429623998fbda355e65c96671116
Move static methods from URIImpl to URIs.

Change-Id: Ia6ad2d224fb3d01c69101f001ec143e6a4d0b081
Use owl:topObjectProperty and owl:topDataProperty as roots of property hierarchy.

Change-Id: I40c87d15ff2a434ff52e8ea9bbd8898866accca6