Adding optional colour specification for graphing, change drag-box mode zoom for the plots, and homogenizing the indentation mess. Mouseover popups that show graph values. Automatic hiding of date-range buttons.

LOTS of changes here.

2. `rawdata` plots now have selectable colours:  
![untitled](https://f.cloud.github.com/assets/1401239/2007561/780e8836-873a-11e3-9a59-9df0341a78f6.png)  
![untitled2](https://f.cloud.github.com/assets/1401239/2007563/7bc6233a-873a-11e3-9cd1-2ceab042c689.png)

3. Since the plots auto-scale the y axis, having the drag-select-to-zoom mode set to draw-box from the corners is confusing. Flot has a mode that makes this much more apparent, by letting you just select the x extents, and the whole Y is selected automatically:  
![untitled3](https://f.cloud.github.com/assets/1401239/2007587/d911ad48-873a-11e3-8909-b89446ada901.png)


1. The indentation mess (mixed 2/4 space indentation with scattered use of tabs) is now consistently all-tabs.

This is now the default behaviour for the `rawdata` plot.