Refactor modules in Python bindings. Start work on grammar-update functions, but without transactions.

src/runtime/python/transactions.h

@@ -0,0 +1,38 @@
+#ifndef PYPGF_TRANSACTIONS_H_
+#define PYPGF_TRANSACTIONS_H_
+
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+
+#include <pgf/pgf.h>
+
+// typedef struct {
+//     PyObject_HEAD
+//     PyObject *thing;
+// } TransactionObject;
+
+// modifyPGF
+//
+// branchPGF
+//
+// checkoutPGF
+
+PyObject *
+PGF_createFunction(PGFObject *self, PyObject *args);
+
+PyObject *
+PGF_dropFunction(PGFObject *self, PyObject *args);
+
+PyObject *
+PGF_createCategory(PGFObject *self, PyObject *args);
+
+PyObject *
+PGF_dropCategory(PGFObject *self, PyObject *args);
+
+// setGlobalFlag
+//
+// setAbstractFlag
+
+
+
+#endif // PYPGF_TRANSACTIONS_H_