Created HTTPDownloader to download files.

Edited build.gradle to include junit-addons for testing. Added test file to
the resources to test files downloaded from HTTPDownloader and the future
HTTPSDownloader.
Added HTTPSDownloader and test for using HTTPS protocal.
Merge branch 'feature/downloading'

Added the ability to download update files through HTTPS and HTTP.
Improved Travis-CI output.
Merge branch 'master' of github.com:JTWalraven/jAutoUpdater

This was need because I updated the README.md through GitHub.com