Lively Web compatibility

These are the changes from last Friday. To get Lively running do

1. a checkout of this branch
2. `git clone -b vwf-compat https://github.com/LivelyKernel/LivelyKernel.git public/lively`
3. Make sure there is a file `localconfig.js` similar to the one listed in https://github.com/LivelyKernel/LivelyKernel/pull/206 in `public/lively`

You should then be able to startup a world with a single rectangle by visiting http://VWF_HOST:VWF_PORT/lively/.

/cc
@rchadwic
@allisoncorey
@davideaster
@scottnc27603
@eric79