changed wording
support string to VARCHAR

if size is defined, we can convert string type to SQL VARCHAR type,
without the need to cast between string and hood.Varchar.
Merge pull request #28 from coocood/master

support mapping string type to VARCHAR
declare string fields as var char if size is set for postgres driver as well
Remove VarChar type
Added Regular Expression Validation and Changed ValidationError
amend readme
Merge pull request #29 from coocood/master

Removed VarChar type, added regular expression validation, changed ValidationError
correctly handle Created and Updated time fields (resolves issue #33)
updated regexp validation info
tests for update and create timestamps; dialect specific Now method (resolves issue #31)
improved Where, added And and Or methods
removed example, link to unit tests instead
use paths wherever possible
made dialects private
fixed comment
google group link
Avoid crashes from null values
Implemented tests for null Find. Fixes #39.
implemented indexes via Indexed interface. fixes #41.