Bug 1039980: Change license to Apache 2

This patch changes the license of nfcd from Mozilla Public License 2
to Apache 2. It adds the required files LICENSE and NOTICE to the
source tree, and replaces the copyright notice in each file.

Signed-off-by: Thomas Zimmermann <tdz@users.sourceforge.net>
Merge pull request #35 from tdz/bug-1039980

Bug 1039980: Change license to Apache 2. r=dimi