changed all urls to be relative (no starting slash) and without /pixel-editor/. Fixed the testing server to deal with these requests (and also include some better logging).
Added npm modules 'open-cli', 'concurrently', 'reload', and 'wait-cli'
NPM script 'hot' will now open the page once the server is up the first time thanks to 'wait-cli' and 'open-cli'
After that, 'reload' will take care of refresing the page when it's dead-man switch triggers
Co-authored-by: ndoker <pawelbarszcz@gmail.com>
