Bollinger Band glyph example

added an example for creating a bollinger band glyph
Added bollinger band glyph (notebook)

ipython notebook example of a boillinger band glyph.
Bollinger band server example

Added an example for creating a Bollinger band glyph in bokeh-server.
bollinger band examples 2.0

heavily simplified bollinger band examples
Merge pull request #241 from rpazyaquian/master

Bollinger band examples