Relative paths

[sacdallago]

1. Docs are loaded via relative path and not using __dirname which produces unexpected behaviors when launching the app not from within the same folder https://github.com/Rostlab/JS16_ProjectA/blob/master/startUp.js#L157
2. Images are accessed via relative path, which makes images not load if application is not started from within the root app's folder https://github.com/Rostlab/JS16_ProjectA/blob/master/startUp.js#L160

Can be fixed in 2 minutes coding.