Merge tag 'v1.3.0'

1.3.0
Map object/json to TEXT

See https://github.com/strongloop/loopback-connector-mysql/issues/36
Merge pull request #37 from strongloop/feature/fix-issue-36

Map object/json to TEXT
Fix comparison for null and boolean values
Merge pull request #38 from strongloop/feature/fix-comparison

Fix comparison for null and boolean values
cannot read property of undefined fixed

fields seems to be undefined sometimes.
Merge pull request #39 from JohnnyBill/patch-1

cannot read property of undefined fixed
Bump version
Merge branch 'release/1.4.0' into production