Process implements the IDisposable Interface : add a Close() and Dispose() methods

[michaelhidalgo]

The current implementation for :
https://github.com/o2platform/FluentSharp/blob/master/FluentSharp.CoreLib/O2_DotNetWrappers/Windows/Processes.cs#L137

Does not releases the memory after the execution of the code, it can be done by adding the Close() and Dispose() methods or by introducing the using statement.