Redesigned adaptor and created checkboxes app logic for the price filter
Finished connecting price filter  with FilterDialogFragment and OfferListFragment.
Merge branch 'master' into dev-issue-#37

Conflicts:
	bargainhunterandroid/src/main/java/com/bargainhunter/bargainhunterandroid/ui/fragments/FilterDialogFragment.java
	bargainhunterandroid/src/main/res/layout/fragment_filter_custom_child_row.xml
	bargainhunterandroid/src/main/res/layout/fragment_filter_dialog.xml