Track some CM repos

* Calculator
* Calendar
* Exchange
* libpng
* libusb
* prebuilts_misc

Change-Id: I2e0123b18cc8c3f99dfad43584c3ef6d0c327ee0
Signed-off-by: houst0nn <houstonn@gmail.com>
Merge remote-tracking branch 'PA/kitkat' into remix-legacy

Conflicts:
	default.xml