Merge pull request #16 from MacWarrior/master

Major update 0.4.0
Merge pull request #17 from MacWarrior/master

Some fixs
Merge pull request #19 from MacWarrior/master

Version 0.4.2 : Remove unneeded code
Merge pull request #20 from MacWarrior/master

Version 0.4.3 : Update to WooCommerce 2.X.X
Version 0.4.4