Updated my JDK to version 7 update 51 to test the fix suggested by Bruno on S.O.

I’m still getting the same error.
http://stackoverflow.com/a/22324690/667440
I added the maven compiler plugin. I'm compiling against Java 7 which is the version that I updated to last night.
I commented out the addHeader part because I don't need it for now.
I'm trying to hit the url that bruno suggested on S.O.
I made corrections to the compiler plugin based on suggestions from S.O.
Everything works now. I added the url api for the printful.
Merged in the changes from the soexperiment branch.