Removed references to redundant SUBDIRS
Added link to ReadTheDocs
Bumped version for next release
Removed SQLWarning

Dangerous to rely on warnings on targets - sources are un-reliable, but
targets like CSV and SQL should be totally reliable to write to. Still,
it's useful to standardize on a single error class so SQLError remains
and all SQL exceptions encountered during write() are re-raised as
SQLError
Removed ignore_insert_errors

Was included by mistake in prior commit
Add support for multi-row INSERT

Can't test on Ubuntu Precise yet though as sqlite3 version isn't high
enough. Will have to test on a Quantal or Raring VM...