Automate the build of the card applets

[jeremi]

Now the code can only be built using Eclipse with the NXP provided tools. It would be good to be able to build the applets and later run the tests using an automated pipeline.

Todo:

• Move the files to adhere to a classic Gradle structure
• Use gradle-javacard (https://github.com/fidesmo/gradle-javacard) to build the applet
• Add Circle-ci configuration to automatically build the project

[typelogic]

This PR is built in circleci