Merge branch 'sbt' into downloads
Cleanup bokeh/widgetobjects.py
Add Date property and DatePicker widget
Add Panel and Tabs widgets
Allow BasicTickFormatter.precision to be None to allow non-scientific values

None shouldn't be really allowed and 'auto' should be used instead,
and current meaning of 'auto' changed to 'adaptive'.
Add DownloadsApp example
Merge branch 'master' into downloads

Conflicts:
	.gitignore
Add handsontable to bokehjs/src/vendor
Add data and pivot table components from CDX
Move ObjectExplorer to from util to widget
Make ObjectExplorer usable as a widget
Throw an error if can't load a module in base.coffee
Add icons for types in object explorer
Preliminary new widget objects and HandsonTable
Make widget objects visible to Viewable
Add numeral.js and add numeral and handsontable to config.coffee
ObjectExplorer: node click on ColumnDataSource activates editor
Preliminary implementation of HandsonTable.render()
Add glyphs/widgets_server.py example
Allow to specify columns for HandsonTable wiget