Cherry-pick changes from release-0.2.

* Prepare documentation for a release-0.2
  Update git clone information, rename murano-manual to
  developers-guide, update known issues
  I90423126b5e4a49ef424fcf63373de5472804235
* Add user-guide draft. Exclude screenshots
  I1d5fa671b8a2eefcc4887ec177702c9e04ef8584
* Fix last typos and remarks in developers guide
  Also User guide was filled in with screenshots and updated
  with new information.
  I5e2592087c142202fe03db2123d0fe91dd9669de
* Murano Deployment Guide renamed and updated.
  Ia7b14e7dc79c2721901d3a1a5c53c9334335c12a
* Fix incorrent sentence
  Ib781c3ca247b91aebf5031e4ec8997e8277c6574
* Alpha version of murano user guide
  I88c8ad45e6f4a7a3d8c0f42579dba252c479372d
* Add forgetten images
  I5aba9d88ad70b100e45a6a0c278054b93dc4f1bf
* Developers Guide pom.xml was accidentally deleted
  I6e966105711394d0fe9426ac78e68c4dea8d728f
* Add getting-started guide
  Also changed:
  1) User guide updated: table with service description
  for AD was added
  2) Add information for configuration OPENSTACK_HOST
  in installation guide
  3) Some style for this documents was added
  Iaff2b841990e10e8c2cfd657a01ca76514491f10

Change-Id: Ic0ac44675999aca3e872c1762e4a1d7f1553f5f2