JERSEY-1898: Add section on the new MVC templating support to the user guide.

- PS2: rebased, review comments incorporated.

Change-Id: I02b48ab1b19d22e5a3acce89b1b23c698815ded0
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>
JERSEY-1869: Test Framework chapter

- PS2: rebased, incorporated review comments.

Change-Id: I5461f7539a1752a21c46f22f9440eada365dfc7e
Signed-off-by: Marek Potociar <marek.potociar@oracle.com>