support any custom widget not just string based ones
add destroy method to WidgetBase which is beaing called on remove
add custom widget to display pointers

the custom widget is able to follow the pointer
Merge branch 'master' of https://github.com/webgme/webgme
update to use config file as input parameter
getExternalInterpreterConfigUrlAsync - now the gui is able to generate a config file for an external client based interpreter
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of github.com:lattmann/webgmetools