Changed required execution environment to Java 7

Change-Id: I7fd0e8402fde04e5f457be2d336accc2e6bb4bf1
Updated vendor information.

Change-Id: I462502741c322d3e6af6cd01925107dc2a4499c4
Removed unused instance value from ILiteral interface.

Change-Id: I6294b7a9cb3fb0d0468f0c186ed6a67f2b015c75
Move static methods from URIImpl to URIs.

Change-Id: I06c5699dc5a9b161b1e97ef2aec21f5e105fc787