add left button on nag bar
version bumped to 2.0
added Button on left of nag bar
Merge branch 'release/Version1.0' into develop

* release/Version1.0:
  version bumped to 2.0
  add left button on nag bar
Merge branch 'develop'

* develop:
  added Button on left of nag bar
  version bumped to 2.0
  add left button on nag bar