New option to wrap database hits

Nobody has claimed this yet.

It would be _really_ nice if a function could be provided to `conman/bind-connection` that would wrap database-touching functions.

Something like

``` clojure
(conman/bind-connection *db*
{:wrapper-func log-it}
"sql/queries.sql")
```

where a theoretical `create-user!` call would be defined as

``` clojure
(defn create-user! [map]
(REAL-create-user (log-it map)))
```

or something to that effect.

Start at conman/bind-connection and inspect how SQL from sql/queries.sql becomes database-touching functions such as create-user!. Clarify the intended wrapper-func behavior using the log-it example, including what arguments it receives and which generated functions it affects. Done means the option has an agreed scope and wrapping behavior that is covered by tests.

Written by the indexing model from the issue text.