Initial test to fix memory leaks wrt Picasso
Removed static elements from userPrefs and NewsCatPrefs
Removed static context.
Merge branch 'fixMemLeaks' into dev

Conflicts:
	assets/newsCat.json
	res/values/strings.xml
	src/in/sahildave/gazetti/StarterApplication.java
	src/in/sahildave/gazetti/homescreen/HomeScreenActivity.java
	src/in/sahildave/gazetti/preference/FeedSelectFragment.java
	src/in/sahildave/gazetti/util/GazettiEnums.java
	src/in/sahildave/gazetti/util/NewsCatFileUtil.java
	src/in/sahildave/gazetti/util/UserPrefUtil.java
	src/in/sahildave/gazetti/welcomescreen/WelcomeScreenFragmentExpList.java