Reduce cache key instability caused by feature discovery during has!
loader plugin branching.  Also simplify/consolidate calculation of
expanded dependencies.
Update readme with upgrading information.
Update serialVersionUID for classes serializable classes that changed
instance data.
Change result of IDependencies.getDeclaredDependencies from String[]
back to unmodifiable List<String>
Move simplifyInvariant from BooleanFormula to ModuleDepInfo
Merge pull request #97 from chuckdumont/master

Reduce cache key instability caused by feature discovery during has!