Improve transverse Ising generic example.
tdvp_uniform:
 - Fix whitespace
 - Rename self.h to self.h_expect
 - Add verbose option to excite functions
Fix axis labels.
Redo transverse ising uniform example. Do excitations instead of real time evolution.
Update tdvp_sandwich to refer to h_expect in uniform.
Add top. non-trivial excitations to uniform ti example.
Change operator names and update heisenberg example.
Update uniform heis. example and tweak others.
Add exact elementary excitation to tiu example.
Fix whitespace and add zero_tol.
Merge branch 'master' of /home/ash/qigitp/mps/code/evoMPS

Conflicts:
	evoMPS/mps_sandwich.py
Add some features to sandwich go() and repair state loading a bit.
Repair whitespace damage.
Revert "Improve correlation_length function."

This reverts commit 974ed0a3853334f4c972e3211a96ba7f57cdf03a.
Redo "Improve correlation_length function" without the whitespace changes.
Update sandwich examples.
Make quench a little more interesting.
Revert "tdvp_uniform:" due to whitespace messin'.

This reverts commit a3625c7ec6860d9c6c4558fa68051a52e180b1c8.
Revert "Update tdvp_sandwich to refer to h_expect in uniform."
Due to whitespace messin'.

This reverts commit d50492404cefede3b3e09f07fe943ced6962621e.
Change h to h_expect in uniform case.