Add application/javascript to text types

Javascript code also needs charset HTTP header to correctly use UTF-8 strings. This patch adds 'application/javascript' to list of additional text types in MimeTypes class
Added new documentation for play 2 http api
merged from dev/master
reverted back to 0.9 version of junit-interface
Merge pull request #714 from nraychaudhuri/967_fix_junit_tests

967 fix junit tests
Last fix to the Migration and Highlight documents
Change references to 2.0 in the README document
Fix issue 969: Status 404 when accessing minified Javascript
Update documentation/manual/scalaGuide/main/sql/ScalaAnorm.md

Fix sample code
made necessary changes to docs for 2.1 release
Merge pull request #719 from nraychaudhuri/update_documentation_for_2.1

made necessary changes to docs for 2.1 release
Documented thread pools and execution contexts
Update documentation/manual/detailledTopics/configuration/ThreadPools.md

A small typo as mentioned in #721
Modified steps for creating new application
fixed typo
Merge pull request #723 from nraychaudhuri/21_create_new_app

Modified steps for creating new application
Merge pull request #722 from ndeverge/patch-4

Update documentation/manual/detailledTopics/configuration/ThreadPools.md
Update documentation/manual/scalaGuide/main/ws/ScalaWS.md
Bumped version to 2.2-SNAPSHOT
s/playframework.org/playframework.com