Added >1 framework class per framework support, this enables sbt to support both old and new framework API at the same time.
-Moved code that count test results from TestLogger to TestResultCounter.
-Print the results in Tests.showResult.
Added support of custom summary message returned from Runner.done method.
Use info for summary output.
Changed to display framework summary whenever possible.
Added code to tag test task using Array[String] returned from Task.tags method.
Added .gitattributes file.
Normalize line endings.
Indented using tab, and removed some unused comments and brackets.

Conflicts:
	testing/src/main/scala/sbt/TestFramework.scala
Added support of nested test tasks when tests are executed InProcess and sequentially.
Added support of nested test tasks when tests are executed in SubProcess.
Initial working version of makeParallel that support nested tasks.