Moved and renamed JUnit and TestNG Helper sections

Moved JUnit Test Helper section inside Using the Java Helper Library section and renamed to JUnit Helper Library. Renamed TestNG Java Helpers section to TestNG Helper Library
Merge pull request #92 from jvanderwee/patch-1

Moved and renamed JUnit and TestNG Helper sections
markdown/reference/getting-started.md
Merge pull request #93 from AbhijitPendyal/master

changes to getting-started guide
Renamed and re-arranged the getting-started guide

rearranged content to deliver a better flow. added pretty linking
made changes as suggested by Colin
Merge pull request #94 from AbhijitPendyal/master

Renamed and re-arranged the getting-started guide
Merge remote-tracking branch 'upstream/master'
Reference latest version of Sauce Maven archetype