Fix alpn_test

Add accessor peer() in ClientContext and ServerContext

Made binding a server to a port insecurely explicit

Make FileNameInUpperCamel aware of directories

Switch ALPN/NPN to advertise only h2

Small fixes

Remove optional parameter from watch connectivity state

Enable oauth2_auth_token and per_rpc_creds interop tests for C#

Make call_create with host=NULL provide a default host name

Test coverage for Python.

Also updates the version of grpcio_test. Now that grpcio and its tests
are in different project packages, the version numbers should be kept in
sync.

Fix Ruby segfaults and TSAN reported races

Reorganize src/python.

Run test server locally

Conflicts:
	vsprojects/Grpc.mak
	vsprojects/grpc.sln
	vsprojects/grpc/grpc.vcxproj
	vsprojects/grpc_cpp_plugin/grpc_cpp_plugin.vcxproj
	vsprojects/grpc_csharp_ext/grpc_csharp_ext.vcxproj
	vsprojects/grpc_csharp_plugin/grpc_csharp_plugin.vcxproj
	vsprojects/grpc_objective_c_plugin/grpc_objective_c_plugin.vcxproj
	vsprojects/grpc_python_plugin/grpc_python_plugin.vcxproj
	vsprojects/grpc_ruby_plugin/grpc_ruby_plugin.vcxproj
	vsprojects/grpc_unsecure/grpc_unsecure.vcxproj

Regenerating project files and massaging VS project files.

This is in preparation of moving all tests into a separate package to
enable ease of coverage checking and testing.

Move grpc_census_call_*_context calls into public header

Python documentation generation.