Merge pull request #8 from osate/master

merge master to branch develop
* Aadl2Utils.java:
  - Add "getAbsolutePluginPath", method that returns the local file system absolute path for a plugin by its name.

* FileUtils.java:
  - Add following methods:
    - "stringTofile": convert a string object into a file object.
    - "getContainningDirectory": return the parent directory of a file object.
    - "getSubDirectories": return recursively the sub directories of a directory.
* FileUtils.java:
  - Fix wording.
Merge pull request #9 from osate/develop

Develop