cache
mer cache
ny testnewsfeed, cache fungerar nu för newsfeed

Testnewsfeed kontrollerar nu att servern skickar ett komplett json.
Cache för bilder fungerar nu i mainactivity
Added JSON test to InfoTest.java
Error view on no connection test
Menu, now with pictures.
Merged develop into facebook
Polished LoadData and error messages

Moved error messages handling from LoadData-class to Activity-classes.

LoadData methods now throw exceptions catched by Activity-classes.
Error messages displayed in ErrorView instead of ListViews.

Implemented method in BaseActivity that checks Internet connection.
Merge branch 'develop' of https://github.com/jonasberglund/skrubb_DAT255 into develop

Conflicts:
	H-sektionen/src/se/chalmers/h_sektionen/utils/Constants.java
Merged facebook into develop
Merge branch 'develop' into elvan