[SPARKL-95] - First version of urlEncode ant urlDecode kettle parameter transformations.
[SPARKL-95] - URI Path encoding now working properly.
- Changed transformation names to uriPathEncode and uriPathDecode.
- Added library dependency to javax.ws.rs implementation.
- Added code comments.
[SPARKL-95] - Plugin directory is now being obtained from a PluginSystemRead in order to get a consistent path encoding across different OSes.
[SPARKL-95]  - Added unit tests for KettleParameterHelper uriPathEncode and uriPathDecode functionality
- Updated CpkCoreKettleElementTest mocking
[SPARKL-95] - Added unit tests for KettleElementHelper
Merge pull request #28 from graimundo/master

Injected CPK directory variables encoding