Use @compileTimeOnly for .value and .parsed methods.

Needed to set position on wrapper method for correct error message position.
Updating the address of the xsbt-proguard-plugin
switch dispatch to dispatch.classic to avoid collisions with plugins which use newer versions of dispatch (0.9+)
Fix link to sbt-git plugin

The old url https://github.com/sbt/sbt-git-plugin resulted in an 404 error. Changed to https://github.com/sbt/sbt-git which seems to be the correct url for that plugin.