Fix comparison of UUIDs with the same time.

There was an inconsistency where two different UUIDs created from
the same time would correctly report == as false, but confusingly
report <=> as 0. Now <=> is implemented per RFC 4122's "Rules for
Lexical Equivalence", and == is no longer a special case.
Merge pull request #13 from nearbuy/fix_comparison

Fix comparison of UUIDs with the same time.
New release to point to the new homepage
Fix crash newing up from frozen bytes.

Don't need the force_encoding anymore after changing how ==
is implemented.
Merge pull request #14 from retailnext/fix_encoding

Fix crash newing up from frozen bytes.
Merge pull request #1 from cassandra-rb/master

Updating to upstream master