Add mapreduce that works locally

mapreduce/.funcignore

mapreduce/.gitignore

mapreduce/DurableFunctionsHttpStart/__init__.py

mapreduce/DurableFunctionsHttpStart/function.json

mapreduce/Mapper/__init__.py

mapreduce/Mapper/function.json

mapreduce/MasterOrchestrator/__init__.py

mapreduce/MasterOrchestrator/function.json

mapreduce/Reducer/__init__.py

mapreduce/Reducer/function.json

mapreduce/Shuffler/__init__.py

mapreduce/Shuffler/function.json

mapreduce/host.json

mapreduce/requirements.txt