Added -l to gem:install task.
Bump test-unit dev dependency to 2.5.0 and simply check for MS Windows.
Added changes for 1.2.6.
Updated CHANGES file and bumped versions.
More notes for the CHANGES file, plus a release date.
Added a release date to the CHANGES file.
The clean task now deletes .gem files.
Added a release date to the changes file.