Handle postgres 'with tz' in files and cleanup

- Drop the +XX in postgres 'with time zone' columns
- remove a jruby-incompatible spec
- reminder/note that specs will fail under jruby if you don't have your
  mysql server character set set to utf8mb4
whitespace, comment, and regex simplification
bump version
Merge pull request #5 from square/smparkes/with_timezone

Handle postgres 'with tz' in files and cleanup