Issue #1 finished

Created classes:
   - StoreAdapter
   - StoreListFragment
Created resources:
/layouts
   - fragment_store_list.xml
   - fragment_store_grid.xml
Update fragment_store_list.xml

removed style : rounded_corner
Rename onFragmentInteraction listener in StoreListFragment to onStoreListFragmentInteraction.
Merge branch 'dev-issue-#1'

Conflicts:
	bargainhunterandroid/src/main/java/com/bargainhunter/bargainhunterandroid/MainActivity.java
Refactor some code and fix conflicts after merging