nbdiff now opens browser automatically
made a function to open browser when called
Fix imports for fresh install
Merge branch 'master' of https://github.com/tarmstrong/nbdiff into webbrowser-open-automatically

Conflicts:
	nbdiff/commands.py
Merge pull request #114 from bsplay/vcs_adapter

Vcs adapter
Fix gitignore merge testfolders entry
Merge pull request #117 from MandMk/webbrowser-open-automatically

Webbrowser open automatically
git adapter fixes and improvements
Merge branch 'master' into vcs_adapter
nbdiff now ignores unmerged files