Revert "Move to support fragments for back-stacking"

This reverts commit 0047e1bfe5ec5f84852226c0ed0dac629bf92232.

Conflicts:
	res/layout/fragment_asset_detail.xml
	src/com/espiandev/redux/assets/AssetDetailsFragment.java
Tests around the new buttons on asset details
Small refactors
Basic cast action view
prevent crashes relating to orientation changes
UI tweaks
UI tweaks