Bokeh chart fixes and improvements

[stared]

• [x] fix the example (notes, remove redundant lines)
• [x] make it working in Colab
• [x] add line color palette
• [x] scale to window
• [x] add tooltip
• [ ] add range restrictions for zooming
• [ ] add dynamic log scale
• [ ] annotate maximum and minimum?

Things that may be useful:

• https://stackoverflow.com/questions/31496628/in-bokeh-how-do-i-add-tooltips-to-a-timeseries-chart-hover-tool

[stared]

Tooltip init

Right now there is an issue with overlap I try to solve. Hints from here:

• https://stackoverflow.com/questions/31496628/in-bokeh-how-do-i-add-tooltips-to-a-timeseries-chart-hover-tool
• https://stackoverflow.com/questions/31226119/bokeh-hover-tooltip-not-displaying-all-data-ipython-notebook/31234792#31234792