changelog update.
Updated 1.env-setup.sh. Changed QT source.

The source website for the qt was outdated, updated with a new link.
Merge pull request #22 from dale3rulz5577/patch-1

Updated 1.env-setup.sh. Changed QT source URL.
Merge branch 'release-0.1.3'
minor: re-marking branch as stable.
changelog update
Merge branch 'master' into release-0.1.3
release branch / non-stable warning enable