Kinematic Effects

Whenever an electron or positron is emitted, you can now choose to simulate kinematic effects (i.e. shifting of energy due to relativistic speeds of ions).  The readme has been updated to include the new commands.

The SPICE root tree now includes original phi, theta & energy of particle when emitted.

There shouldn't be any conflicts with Mhd's pull request, but do his first then we'll see.