Selecting two circles now draws a line

The line does not move when circles move yet however.
Merge branch 'master' of github.com:wouterbeek/WebQR
Fixed reference and moved connection creation

1) Fixed reference to CircleObj instance in edit(e)
2) Created a ConnectionObj object that will contain the logic for connection
objects
Merge branch 'master' of github.com:wouterbeek/WebQR