Some important changes

[peter279k]

Changed log

• Integrate StyleCI service to check PSR-2 coding style automatically on incoming commits and PRs.
• Integrate the Travis CI service, please. And it can find the bugs/errors via automatic CI build.
• Fix wrong namespace for ImageConverter class.
• Create helper function and let convert function split from the ImageConverter class.

The completed Travis CI build log and StyleCI log are as follows:

• Travis CI build log.
• StyleCI log.

[jenstornell]

1. Now I got confused. I thought we agreed on not using jens in the namespace, but now it's back again? namespace Jens\ImageConverter; Better shorter namespace? #6
2. About splitting the class and the helper method into two files. It's good from a developer perspective, but from a user perspective we need to include two files instead of one, in every project. Especially if Composer is not used. I will think about it, but it has some pros and cons.

[peter279k]

1. Now I got confused. I thought we agreed on not using jens in the namespace, but now it's back again? namespace Jens\ImageConverter; Better shorter namespace? #6
2. About splitting the class and the helper method into two files. It's good from a developer perspective, but from a user perspective we need to include two files instead of one, in every project. Especially if Composer is not used. I will think about it, but it has some pros and cons.

1. I think we can revert the namespace to the ImageConverter. And I'm sorry I almost forget this.
2. Without composer, and we can rpovide the autoload.php for developers to load related ImageConverter automatically.

[lablnet]

This looks fine to me

[spekulatius]

Hey @jenstornell

any change this could be reviewed and merged? I'd like to use the package :)

Cheers,
Peter