Upgrade projects to newer versions and improve the structure. Fixes #94

Merge branch 'master' of https://www.github.com/ProgTrade/nUpdate

Merge into master

Update version to v3.3.1

Merge branch 'release/v3.3'

Merge branch 'release/v3.2.1'

Merge branch 'release/v3.2'

Merge branch 'release/v3.1.8'

Merge branch 'release/v3.1.2'

Merge branch 'release/v3.1'