Removed preferred install location external in manifest (otherwise app
won't install on emulators without external storage).
Added a screen draw timer and touch event handling. Also added a
Dandelion class.
Added timers for growing of flowers.
Forgot to add files for commit.
Dandelions change state automatically and are removed when touched.
Changed images and animation. Integrated seeds and dandelions. TODO:
Music and sound; Fine tune spawning times, Proper game ending.
Added background music.