build with gradle

[hamano]

gradle is more easy to maintenance.

[hamano]

I also added debug option:

% java -jar build/libs/ComplianceTester-all.jar
Missing required parameters: <username>, <password>
Usage: java -jar ComplianceTester.jar [-d] <username> <password>
      <username>   [email protected]
      <password>   [password]
  -d, --debug      debug option

[RishiRaj22]

Hi, thanks for your work. However, this repository has been deprecated in favour of the new compliance tester tool available on https://github.com/iNPUTmice/caas
I will update the readme to avoid any future confusion.