Upgrades for modules, plugins, SBT.

I've touched all the example project to...
* Add support for SBT 0.12.2 (build.properties added, web plugin dependency changed)
* Upgraded Eclipse and IntelliJ plugins to latest versions
* USe Lift 2.5-M4
* Switched jquery module to use the new _.2.5 naming scheme.

BTW, I noticed that the lift_json project doesn't contain a runnable web application. Not sure why this is.