- changelog for pullreq 32

- changelog for pullreq 32
- Fixed a regression whereby the "collation" parameter
of the character types CHAR, NCHAR, etc. stopped working,
as "collation" is now supported by the base string types.
The TEXT, NCHAR, CHAR, VARCHAR types within the
MSSQL dialect are now synonyms for the base types.
- move out the type rendering tests into DB-agnostic tests
and remove some of the old "create" statements.  tests here
are still very disorganized.