Renamed SlicerTest to SliceTest
Renamed package slicer to slice
Added Inplace/Function Loops

Loops run a InplaceFunction or a functional n-times. In the case of a
InplaceFunction the input is altered. In the case of a Function an optimal
strategy is used such that the Function only works with one buffer and the
right output is returned.
Mappers: Refactored mappers

InplaceMappers are now InplaceFunctions themselves
Merge branch 'master' of https://github.com/imagej/imagej-ops
Added Author
InplaceMappers should take arbitrary function
InPlaceLoop can also use function
DefaultInPlaceLoop: Can handle function
Loop: Require getFunction/setFunction in interface