Support for perturbed quantity plotting.
Update examples for new module layout.
Updating matplotlib version.
First attempt at Thermal Forcing.
Moving stable region to be longer
Working thermal forcing with correct profiles.
Merge branch 'thermal'

Conflicts:
	Flox/component/temperature.pyx
	Flox/ic.py
	Flox/nonlinear/__init__.py
	Flox/nonlinear/_nonlinear.pyx
	examples/nonlinear-test.yml
	examples/stable-unstable.yml
Support for arbitrary forcing ranges.
Cleanup initial conditions code.