Switched db columns for backward compatibility

Merge branch 'master' of https://github.com/BitBagCommerce/SyliusCmsP…

…lugin

MySQL compatibility release

v1.2.1

Create UPGRADE.md

Sylius plugin standards are now on the board. Sorry for BCs :(

Due to recently implemented Sylius plugin standards, described in http://docs.sylius.org/en/latest/plugins/creating-plugin.html#naming-conventions, as major Sylius plugin provider, we were forced to make a new release which follows these rules.

v1.1.0: Merge pull request #91 from bitbager/master

[Demo] Update fixtures