feat(Layout): iFrame safe now reuses ids of deleted pane and is on by…

… default

In Chrome removing a sibling that appears before an iframe from the DOM causes the iframe to reload.
We prevent this now by leaving wrapper elements behind for deleted panes and reusing the ids of
deleted panes when new panes are added later.

feat(Subdivide): Add iframe safe mode to stop iframe in more recently…

… panes reloading when prior pan

chore(CI): add travis CI

set build to use production

removed radium as a dependency

added npm ignore

Change layout to subdivde in store