Major Refactoring on plyxproto

- Reorganized code and removed copy of ply
- Reformatted code to be closer to PEP8
- Updated to Python3 compatibility
- Added tox test runner and created test cases
diff --git a/MANIFEST.in b/MANIFEST.in
new file mode 100644
index 0000000..ceeea23
--- /dev/null
+++ b/MANIFEST.in
@@ -0,0 +1 @@
+include VERSION