Change the ios side to use TEXT instead of a BLOB to store the trip sections

This allows us to bypass the stupid sqlite plugin implementation of the blob
handling, which appears to encode the field as base64, but the resulting base64
is not decodable by the webkit btoa function.
Merge pull request #11 from shankari/cordova-crossplatform

Change the ios side to use TEXT instead of a BLOB to store the trip sect...