Merge pull request onmyway133#65 from pokryfka/fix_manifest

Fix manifest - 'v6' was introduced in PackageDescription 5.1

Update project settings

Merge pull request onmyway133#53 from cgmaier/build-lib-for-distribution

set build library for distribution to yes (build setting)

Merge pull request onmyway133#42 from dlindenkreuz/master

Swift package

Update demo to swift 5

Use DiffAware in Texture demo

Update README

Bump to 1.4.0

Update project to Swift 4.2