code cleanup
Merge branch 'master' of https://github.com/mozilla/collusion
[Issue #339] Making the default zoom for Graph 1.25x bigger
adding basic accessibility support to List view
[Issue #282] removed History API and re-implemented breadcrumb
changed wording of 'anonymized' to 'de-identified'
[Issue #336] added keypress handlers to restrict Tab/focus
Adding a private browsing dialog for the collusion page
Adding a Private Browsing dialog
Merge pull request #345 from erikvold/issue-336-pb

Issue 336 private browsing dialog
fixes and tweaks for dialogs: keypress handling, private browsing notification
dialog - code cleanup
[Issue #328] unified how visualization should response to reset and remove events.  Bug fixes.
fixed stats bar updating issues
[Issue #353] added icon images
added image files
fix merge conflicts