TST: Add astronaut image for image module func testing.
FIX: Minor updates/cleanup in arraypad
TST: Updated tests for arraypad with full module coverage.
FIX: Overhaul to image module
FIX: Incorrect package name in clean-version
CLEANUP: Remove `control` submodule, these should be examples
ENH: Overhaul and refactor of image content & tests.

Improvements to test suite.

There was redundancy in `contrast` algorithms. No longer.
`image.focus` was contrast, not focus at all, and was
moved into `fuzzymath` replacing more primitive `contrast`.

`sigmoid` also moved into `fuzzymath`.
CLEANUP + TST: Remove broken `sinmse` and increase test coverage.
FIX: try/except for full Python type compatibility.
ENH: Improvements to `pad` and test suite backported from NumPy
Merge pull request #31 from JDWarner/use_arraypad

ENH: Overhaul image submodule