Multithreading support #20
Description
A single case of manak currently runs on a single thread for benchmarking, but sometimes user needs to run the same function on multiple threads and check performance. For this we need to add mutithreading support in Manak. User should be given option about the number of threads this function will be run. Here we need to take into consideration the race conditions that can occur. Maybe C++11 std;:thread can make things better but its not fully supported by visual c++.