Enabled usage of predeterminded javascript user files. Added
`variables.js`, `functions.js` and `globals.js` to build queue.
Therefore added option for emtpy single globs.
Changed some sass for better modular usage.
Added checks for index.njk and data.json files to switch from demo file
usage.
To prevent override of default files.
Updated explanation on demo entry page.
gulpjs
* new spritesmith plugin
* reworked exports
* new nunjucks-render version fixing dependency issues!
File structure
New naming scheme for nunjucks files. Underscore used for files which
are imported and not directly displayed.
Nunjucks blocks where renamed and are placed differently.
New macro for navigational elements.
- updated to 0.4.0
- corrected license for npm
- update to gulp 4
- updated all dependencies
- new and removed packages, see `package.json`
- changed file structure, renamed `pages` to `screen` and new `data`
folder
- complete change of `gulpfile.js` with similar output
