Also move the app fundamentals document back to fundamentals.jd
TODO: resolve links in the javadocs
Change-Id: Ia3c81a83bf7fe75f7942fd41bfb1d626ee72d5d9
docs: rewrite resources documentation
Huge overhaul. Includes all new dev guides about how resources are used
on Android and how to provide alternatives, including how to handle
runtime configuration changes (restarts). Plus all new reference
docs for all the resource types (drawables, strings, menus, etc.).
Change-Id: I12e819d2c5fc11e062281d8fe442c3037e92000a
