UML Modeler Code

- adding support for interface detection
- adding a new test case for random interface detection

- fixing some bugs

- adding support for Enums in JavaParser
- creating a randomized test environment for the JavaParser
- tuning some of the current JavaParser tests to use the random environment
- adding random Enum detection test

- separating java model generator tests in a package
- random code generation test (generate random ooclass -> string -> parseing -> detected ooclass, compare the original random ooclass with the detected one)
- equals() method in OOClass, OOMethod and OOAttribute (to see if an instance equals one another)
- fixing bugs in java parser (bugs are detected by the new test)

- adding RandomClassGenerator and its configuration class
- fixing bugs in JavaParser (missing break; statements in the state machines)
- adding test on Random Class generation to test the Java Parser

- implementing model linker and linkWithType() methods in OOClass, OOAttribute and OOMethod

- refactoring

- code cleaning

- adding OOEnum class
- adding AbstractModelGenerator class, JavaModelGenerator extends from it
- compilation unit parser method "generateModel()" in JavaModelGenerator
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