0.7.3 fix imports (?) in .sqlalchemy, add experimental .glue, docs for .sqlalchemy

docs/sqlalchemy.rst

@@ -0,0 +1,45 @@
+
+sqlalchemy helpers
+==================
+
+.. currentmodule:: suou.sqlalchemy
+
+SUOU provides several helpers to make sqlalchemy learning curve less steep.
+
+In fact, there are pre-made column presets for a specific purpose.
+
+
+Columns
+-------
+
+.. autofunction:: id_column
+
+.. warning::
+   ``id_column()`` expects SIQ's!
+
+.. autofunction:: snowflake_column
+
+.. autofunction:: match_column
+
+.. autofunction:: secret_column
+
+.. autofunction:: bool_column
+
+.. autofunction:: unbound_fk
+.. autofunction:: bound_fk
+
+Column pairs
+------------
+
+.. autofunction:: age_pair
+.. autofunction:: author_pair
+.. autofunction:: parent_children
+
+Misc
+----
+
+.. autofunction:: BitSelector
+.. autofunction:: match_constraint
+.. autofunction:: a_relationship
+.. autofunction:: declarative_base
+.. autofunction:: want_column