Updates pom.xml to use androud support v7 libraries

Altered android support v4 dependency type to aar. Added dependencies to
android support v7 (appcmpat, cardview and recyclerview) libraries.
Updates application themes of actionbar/toolbar, cardview etc.

Huge update of application theme resource files and style declarations.
Added styles for actionbar/toolbar, cardview and navigation drawer.
Removes test activity from android manifest

Removed test activity declaration from android manifest which should not
be present in source control.