Delete assets directory.
Add license and README.
Ignore lint errors.
Add search_ prefix to resource file names throughout.

It's okay if Android ids collide, so we don't need to prefix ids.
Add manifests and strings.
Add grunt tasks.

default task preprocesses Android manifest and strings.
clean task deletes preprocessed files.
export task copies local changes to Mozilla source tree.
Bring a couple of styles back from pre-grunt