update sbt-launch jar to 0.12.4
update sbt plugins for xsbt-web-plugin, sbt-idea, sbteclipse, and ensime-sbt-cmd
update lift version to 2.5.1 and default scala version to 2.10.2
update jetty-webapp container to latest v8, add sbt workaround for orbit dependency resolution
update slf4j-log4j12, h2 dependencies
update README to include instructions for IDEA and ENSIME users
ignore .history files