Fixing CLASSPATH-TOO-LONG error on windows by using an intermediate 'pathing' jar

In Windows, CLASSPATH variable too has a limit along with the character limit of the Command Line. To bypass this entirely, I'm creating an intermediate jar that holds the classpath in its MANIFEST.MF that is formatted to fit the JAR specification.
Merge pull request #545 from sachinsudheendra/jsunit-win-windows-path-length

Fixing CLASSPATH-TOO-LONG error on windows by using an intermediate 'pathing' jar