Include parsed Query String parameters from a GET request (part in the URL after question mark) in q.args

#### Is your feature request related to a problem? Please describe

- Ability to provide a unique link (get request, QR code etc) to users, so they arrive directly on a personalised page
- Didn't really check this, but it seems wave does not recognise the semantic meaning of the `?` in a URL

#### Describe the solution you'd like

Have access in the app to either a parsed list of URL parameters or the complete location/URL as a whole, so it can be parsed in the app itself.

#### Describe alternatives you've considered

Currently the only way seems to be to either:
- use a # with a unique id
- (ab)use the # by also adding a ? in the URL, grab the # arg and parse it, which I assume messes with waves "standard" hash routing