added the getParent method on context
fixed getParent to return a promise when the controller isn't loaded
fixed an issue for getParent where the parent (main component) wasn't registered
if visibility is visible the element will show even if it's parent is hidden
added _getParent documentation
_getParent is also searching in preComponents
fixed DHRAIN-102
fixed client renederer unit tests
Merge pull request #52 from rainjs/topic-grid-pagination

Topic grid pagination is ready for merge