Possible Bug: Test restart functionality and applying constrains

[armantekinalp]

We should test the below line in the restart code. We suspect it creates incorrect results, when we load and time-step.

PyElastica/elastica/restart.py

Lines 92 to 93 in 7b3fe2d

	simulator.constrain_values(0.0)
	simulator.constrain_rates(0.0)

[bhosale2]

Fixed by #249.