Missing support for many ImgLib2 Types

[hinerm]

The current list is missing many integer types:

LongType
ShortType
Unsigned2BitType
Unsigned4BitType
Unsigned12BitType
Unsigned128BitType
UnsignedByteType
UnsignedIntType
UnsignedLongType
UnsignedShortType

[hinerm]

As part of adding support for these types ideally it would be nice if we could refactor the ImgToMatConverter to reduce the duplication of logic for each type.