Change device handle interfaces & others (#142)

* Changed device handle interfaces
* Changed proxy service interfaces
* Move device code into separate files
* Fixed FIFO polling issues
* Add configuration arguments in several interface functions

---------

Co-authored-by: Changho Hwang <changhohwang@microsoft.com>
Co-authored-by: Binyang Li <binyli@microsoft.com>
Co-authored-by: root <root@a100-saemal0.qxveptpukjsuthqvv514inp03c.gx.internal.cloudapp.net>

python/mscclpp/__init__.py

@@ -1,10 +1,31 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT license.
 
-from ._mscclpp import *
 import os as _os
 
+from ._mscclpp import (
+    Communicator,
+    Connection,
+    Fifo,
+    Host2DeviceSemaphore,
+    Host2HostSemaphore,
+    numa,
+    ProxyService,
+    RegisteredMemory,
+    SimpleProxyChannel,
+    SmChannel,
+    SmDevice2DeviceSemaphore,
+    TcpBootstrap,
+    Transport,
+    TransportFlags,
+)
+
 
 def get_include():
     """Return the directory that contains the MSCCL++ headers."""
     return _os.path.join(_os.path.dirname(__file__), "include")
+
+
+def get_lib():
+    """Return the directory that contains the MSCCL++ headers."""
+    return _os.path.join(_os.path.dirname(__file__), "lib")