fix setting breakpoints
properly clear sources when navigating
properly handle the resume event
show first frame's bindings in variables view when paused
Merge pull request #80 from jlongster/master

fix setting breakpoints
fix conflict with clear-sources branch
keep an internal list of sources so we can rebuild the SourceActor list; fix frames with an undefined this
Merge pull request #91 from jlongster/master

better source listing & minor fixes
Make the box-model layout-view work with ios