Forward-port: add increasing volume option for alarm clocks

this commit adds a checkbox preference for "increasing volume" to
alarm clocks. when checked, the alarm will start off at 10% of the
system-wide alarm volume and slowly increase to 100% over the
course of a minute.

Changeset 2: rebase sloppy mess after somebody managed to "splice out" one of my intermediate commits... *facepalm*

Change-Id: Icf3d3eb3e033d70ebc30e8aad7f9cdf8f5438f3a
increase digital clock size

Change-Id: Ib2e24cb8d10fe504a000df6f6793ae7257f5e8b9
add option to remove alarm icon from statusbar

Change-Id: If888c6b57e11ecf3a56e084a398acc7e95cb40cc

Conflicts:

	src/com/android/deskclock/SettingsActivity.java

Conflicts:

	src/com/android/deskclock/SettingsActivity.java