setup an environment for writing sbt-plugin tests with scripted-plugin in plugin project.
add a new test case for a simple settings.
add a new test case for checking the behavior of recompilation when scalateOverwrite is false.
add a new test case for checking the behavior of force recompiling.
Merge pull request #24 from shinnya/add_tests_for_plugin

Add test cases for ScalatePlugin.
update sbt launcher script
allow building from root, use sbt 0.13.5
bump for 0.5.0 release and use sbt 0.13.5 everywhere
specify a scala version for the plugin build
go back to snapshot