Major Description
With the discussion from HADOOP-1425, we need better abstraction and better tool runner utilities.
1. Classes do not need to extend ToolBase
2. functions for parsing general HadoopCommands (-fs, -conf, -jt) should be public
3. We need a ToolRunner, or similar functionality
4. Also we need each class (implementing Tool) to be runnable (main method)
5. CLI objects can be passed to run method of the Tool class (arguable)