Add contact select button and style home view button.

Opens intent to select contact, but does not yet fetch or set the address.
Gives home view buttons alternate state when pressed.
Fetch selected contact address and put it in EditText field.

Also tightens up home view layout to make room for extra button.
Merge branch 'feature/address-book-integration' into develop
Merge branch 'develop' of github.com:votinginfoproject/android-white-label-app into develop

Conflicts:
	app/src/main/java/com/votinginfoproject/VotingInformationProject/fragments/HomeFragment.java