Fixed bug introduced in previous commit that caused everything to break

when persistence.sync.js was enabled.

NPM version bump to 0.2.3

Fixed a bug that fixed a bug of an older version of the mysql driver.

Update node-mysql to 0.7.0 (npm install mysql).

Code indentation, version bump

Set-up library to be used a node library installable via npm. In fact,

it's published on npm right now.

Put back the IF NOT EXISTS in the INDEX generation. This will break the

MySQL back-end, but I'll have to find another solution for that.

Added link to the persistence.js GWT wrapper.