closes #312

Notify the Activity layout that the top most Modal was dismissed only
if no other modals are displayed. Currently this event is used as a
`onVisible` event to to the layout. This whole logic can be simplified
when we implement proper screen visibility events.

closes #312

fixes #312

Create ISSUE_TEMPLATE.md

When ivoking navigation actions such as push, pop etc, instead of
checking modal visibility, check if modal actually contains the given
navigator. This fix alows to change navigation state in screens while
modal is displayed.

Added missing $

My ignorance

Fixed path of RN local Maven repo

Summary:
The old path only work for 'example-redux'

This is a temporary solution to #292