BenchmarkMappers: Renamed Benchmarks and added new Benchmark
AddOpBenchmarks: Renamed benchmarks and added new benchmark
Adapted ThreaderMapperTests after refactoring
DefaultOpService: Better exception if no op matches the parameters
Added InPlaceMapper Interface
Added MapperInterface
Parallelizing: Added small framework for multi-threading

can be enhanced/refactored later
Refactored parallelized mappers

and i wrote parallelized the right way ;-) maybe!
Refactored Mappers to use new interface structure
Added new parallelized AddConstant for ArrayImgs (byte)
Parallel Mappers: fixed parameters