BF: extend pip timeout to reduce install failures

pip seeming to timeout still; extend timeout.
Merge pull request #531 from matthew-brett/extend-timeout

BF: extend pip timeout to reduce install failures
NF: add affine registration module
TEST: add coronal t1 coronal slice for testing
BF: setup histograms with warped image, apply preconditioning factors to gradient, use L-BFGS-B instead of GC, fix bug in mattes initialization