ReadMe Update

Clarified RBTree and made minor Grammar corrections.
First Commit
Seconds to Milliseconds

Changed burstTime and quantumNumber from seconds unit To milliseconds
unit.
Compact Addition of Cores

Refactored the code to add cores in just one line instead of three.
Run Refactored

Refactored the run() method of the Core class.
Merge pull request #1 from shkesar/java-8-cfs

Java 8 CFS