Add mako templates to generate MS Visual Studio projects.

Current state for Windows platform:
-- gpr and grpc_test_util can be compiled
-- gpr_log_test and gpr_cmdline_test pass
	Change on 2014/12/08 by jtattermusch <jtattermusch@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81615574
diff --git a/vsprojects/README b/vsprojects/README
new file mode 100644
index 0000000..369f2a4
--- /dev/null
+++ b/vsprojects/README
@@ -0,0 +1 @@
+This directory contains MS Visual Studio project & solution files.