feat(compiler): Python bindings (#53)

- feat(compiler): python bindings
- build: update docker image for python bindings
- pin pybind11 to 2.6.2, 2.7 is not having correct include_dirs set (still
a question why?)
- using generated parser/printer

compiler/python/DialectModules.h

@@ -0,0 +1,14 @@
+#ifndef ZAMALANG_PYTHON_DIALECTMODULES_H
+#define ZAMALANG_PYTHON_DIALECTMODULES_H
+
+#include <pybind11/pybind11.h>
+
+namespace zamalang {
+namespace python {
+
+void populateDialectHLFHESubmodule(pybind11::module &m);
+
+} // namespace python
+} // namespace zamalang
+
+#endif // ZAMALANG_PYTHON_DIALECTMODULES_H