move and check in OpenFlow protocol modules

Move all the protocol code out of the oftest package and into a of10 package to
prepare for supporting more OpenFlow versions.

The generated code is now checked-in to make it simpler to use OFTest.

Backwards compatibility with out of tree tests is maintained by aliasing the
old module names. The basic test module has been changed to use the new API.
diff --git a/tools/munger/Makefile b/tools/munger/Makefile
index 06cc18d..c6cc8f1 100644
--- a/tools/munger/Makefile
+++ b/tools/munger/Makefile
@@ -11,7 +11,7 @@
 
 PYLIBOF_DIR = ${TOOLS_DIR}/pylibopenflow
 
-TARGET_DIR = ${TOP_DIR}/src/python/oftest
+TARGET_DIR = ${TOP_DIR}/src/python/of10
 
 # Relative to pyopenflow-pythonize exec location
 OF_HEADER = include/openflow.h