Merge pull request #29 from PressLabs/master

update develop
Update codestyle to the WordPress Core stad (fix #26)
Update codestyle to the WordPress Core stad (fix #26)
Update the plugin version to 2.0
Leave a newline after <?php (resolve #25)
Update codestyle to the WordPress Core std. (fix #26)
Update codestyle to the WordPress Core std. (fix #26)
Move all debug log to a function (resolve #22)
Merge pull request #30 from PressLabs/develop

Develop