Started to add model for grid items
Uncommented code for selecting grid or list
Now using page descriptor to determine layout needed for recycler view rather than bundle extras
Added GridPage in View enum
Moved holders into sub packages to tidy the code up
Null check on the adapter now for adding items
Items are now being added based on what page it's on
Added grid page models
Merge branch 'feature/recycler-view-grid' into develop

* feature/recycler-view-grid:
  Added grid page models
  Items are now being added based on what page it's on
  Null check on the adapter now for adding items
  Moved holders into sub packages to tidy the code up
  Added GridPage in View enum
  Now using page descriptor to determine layout needed for recycler view rather than bundle extras
  Uncommented code for selecting grid or list
  Started to add model for grid items

Conflicts:
	src/main/java/com/cube/storm/ui/fragment/StormFragment.java