Merge branch 'hotfix-1.2.2'
Update product.php

When filtering by printable status, the url return was incorrect.

Multiple lines contain 
'$filter_printable=' . $this->request->get['filter_printable'];

It should be
'&filter_printable=' . $this->request->get['filter_printable'];
Merge pull request #4 from adamjm7/master

Wrong url return from admin product controller
Merge branch 'hotfix-1.2.3'
Merge branch 'master' of https://github.com/opentshirts/opentshirts
Bumped version number to 1.2.4
fix for #6 Notice: Undefined index: recurring
add `.project`, `.actionScriptProperties` and `.flexProperties`

included `.project`, `.actionScriptProperties` and `.flexProperties` as
they contain compiler settings and other important nformation for
Eclipse / Flash Builder
add verification for printing method
Merge branch 'hotfix-1.2.4' into develop