Bump to version 0.9.2.2

rake 0.9.2.2 was added to Ruby branch 1.9.3 on 2011-08-11

rake 0.9.2.1 shipped with Ruby 1.9.3 preview 1

Bumped version to 0.9.3.beta.1

Bumped version to 0.9.3.beta.1

Added 0.9.2 release notes.

Updated changes with DSL command changes.

Removed the 'equal timestamp' change comment, since it was out of date.

Bumped to version 0.9.0.beta.5

Bumped to version 0.9.0.beta.4