Rename View functions to match conventions. Also tidy up view classes and remove C style casts. Closes #656
Merge pull request #731 from mapbox/view-rename

Rename View functions to match conventions
Merge branch 'master' of github.com:mapbox/mapbox-gl-native into android-mason

Conflicts:
	platform/default/glfw_view.cpp
	platform/default/headless_view.cpp
	src/mbgl/map/map.cpp
Rename View functions