Calculator: New Features Part 5
Matrix + Themes
TransientResponse has completely redone Matrix math (scaler mult,
functions apply to entire matrices, subtraction and division, det)

bourdakos1 has made a Holo Light theme for the calculator. Find it in
Settings.

Comas can now be used as decimal points, as long as you change matrix
separator to something else. French is updated as an example.

General bugfixes.

Change-Id: Ida8cbe907a135d171362fb82f2e13512c5e4adb4