refactor stream setup to improve screen sharing flow. put screen sharing and screen receiving behind url query parameters

commit cbb4d3522fdda01c21158384f41475d6cf3cadca
Merge: 12ca6c7 e9ac30bc
Author: Brian Peiris <brianpeiris@gmail.com>
Date:   Mon Mar 26 11:03:22 2018 -0700

    Merge remote-tracking branch 'origin/master' into feature/avatar-switching-ui

commit 12ca6c701e1301b1f41c995ec5d30cb4f95829a5
Author: Brian Peiris <brianpeiris@gmail.com>
Date:   Mon Mar 26 10:30:12 2018 -0700

    route avatar selector state changes

commit cddeb304e54ec9d104c42bf59179ba642b959099
Author: Brian Peiris <brianpeiris@gmail.com>
Date:   Thu Mar 22 15:39:17 2018 -0700

    Added avatar model manifest. Moved avatar selector in to React component. Refactoring. Styling

commit a75a7b5c7746c306541748149e0fabc20a6ebcd2
Author: Brian Peiris <brianpeiris@gmail.com>
Date:   Thu Mar 22 09:40:38 2018 -0700

    partial avatar switching implementation

commit 57566dea
Merge: a78b0729 78cba0ff
Author: netpro2k <netpro2k@gmail.com>
Date:   Fri Mar 16 11:48:24 2018 -0700

    Merge branch 'feature/avatar-switching' of https://github.com/robertlong/social-vr-demo into feature/avatar-switching

commit 78cba0ff
Author: netpro2k <netpro2k@gmail.com>
Date:   Fri Mar 16 11:45:09 2018 -0700

    Missing files

commit a78b0729
Merge: 63456982 4d9a358c
Author: netpro2k <netpro2k@gmail.com>
Date:   Fri Mar 16 11:30:38 2018 -0700

    Merge branch 'master' into feature/avatar-switching

commit 63456982
Author: netpro2k <netpro2k@gmail.com>
Date:   Thu Mar 15 19:15:00 2018 -0700

    Allow creating an a-gltf-entity with no src set initially

commit 0e2dad69
Author: netpro2k <netpro2k@gmail.com>
Date:   Thu Mar 15 19:14:06 2018 -0700

    Rework how player rig is instantiated to support avatar switching. Also
    requries changing how nametag is networked.

commit e57d3b02
Author: netpro2k <netpro2k@gmail.com>
Date:   Thu Mar 15 19:07:44 2018 -0700

    Preload all the templates to avoid timing issues with importNode

commit bde46f68
Author: netpro2k <netpro2k@gmail.com>
Date:   Wed Mar 14 18:19:51 2018 -0700

    Add support for changing src on an a-gltf-entity, also some code cleanup

commit 0423267e
Author: netpro2k <netpro2k@gmail.com>
Date:   Wed Mar 14 18:00:37 2018 -0700

    Fix inflating of entities with different rotation order from aframe

commit cdba3564
Author: netpro2k <netpro2k@gmail.com>
Date:   Wed Mar 14 17:59:50 2018 -0700

    Fix inflating of GLTFs with unnamed nodes

commit ea383606
Author: netpro2k <netpro2k@gmail.com>
Date:   Wed Mar 14 17:59:02 2018 -0700

    Fix cloning of GLTFs with unnamed bones