Update install SQL script

Add extra custom field columns for oc_order table.
more api work done
Merge branch 'master' of https://github.com/opencart/opencart
Started working on Selenium tests for SagePay Direct.
Added solution ID to authorizenet_sim.tpl
Merge branch 'master' of https://github.com/opencart/opencart
Fixed captcha (forgets them if entered successfully)
Merge branch 'master' of https://github.com/opencart/opencart
Merge pull request #1532 from Martynas-P/master

Fixed Captchas
more api work done
more api work done
Changed hard-coded language string. Closes #1538
Merge branch 'master' of https://github.com/opencart/opencart
https://github.com/opencart/opencart/issues/1547
Merge branch 'master' of https://github.com/opencart/opencart
more api work done
https://github.com/opencart/opencart/issues/1546
https://github.com/opencart/opencart/issues/1544
https://github.com/opencart/opencart/issues/1542
more api work done