Added features

* Added features
  * Load classes to scene and check for overwriting methods (-loadclass option)
  * Added ignore and don't ignore packages command line option (-ignorepackage and -dontignorepackage)
  * Added dontDfsMethod command line option (-dontdfsmethod)
* Added missing .classpath file for Eclipse support
* Added m_overwrittenRefs property to DfsInfo.java (for method body parsing in OpenCLScene)
* Moved Pair class from rootbeer to soot-rb
* Fixed quoting issue in SootMethod.java
  * SootMethod does quoting, HierarchySootMethod and MethodSignatureUtil do not
* Fixes in RootbeerClassLoader
  * doDfsForRootbeer: check for [] in class names
  * doDfsForRootbeer: do not add root virtual_method to queue (doDfsForRootbeer was done twice for root virtual_method)