Tidy folder structure and add dev mode

Biggest changes in this commit:

- Folder structure has been tidied
- Original wade-libraries can be now found from other_libraries (non-bower, non-npm)
- Latest wade and wade.iso will be copied to /public/lib by Grunt
- All _dev -folders are used to very easily create different versions of working files

Run: node app.js <- public/js -files will be used
Run: node app.js dev <- public/js_dev files will be used