Resolved conflict with last merge
Added auto generated arithmetic interfaces

Since auto generated, they are prone to mistakes whenever interface
would need to differ for special requirement.
Added auto generated implementations of arithmetic interfaces for RealType

These implementations were auto generated from the implementations
in imagej-ops (net.imglib2.ops.operation.real.unary). Since auto
generated they are prone to mistakes.
Added auto generated .list

for autogenerating RealType implementations of arithmetic ops.
Note: this list was generated from net.imglib2.ops.real.unary