1.5.1

• updated SVG Spites functionality #25
• replaced gulp-concat by concat-with-sourcemaps
• fixed rollup sourcemaps issues #26
• added rollup-plugin-visualizer
• added rollup-plugin-persist
• added gulp-cached, gulp-changed, gulp-remember
• updated .eslintignore and .prettierignore
• disble VSCode ext recommendations permanently
• added recommended extensions list for VSCode ./vscode/extensions.json
• added _debug.scss for temporary fixes, unoptimized critical classes which should be solved properly later or removed.
• added RollUp onLog
• added ignore parameter 'dist/test/**' for htmlTest
• updated _debug.scss
• added VSCode "explorer.compactFolders": false