Andy colors

I've been playing with some styling. I've already incorporated your changes (with the tagging by color).  Here's a screenshot (including drag placeholder), or test it out here: https://rawgit.com/EinEnton/probably/andy-colors/index.html

![Screenshot](https://cloud.githubusercontent.com/assets/6421662/3930392/59564542-2441-11e4-9e21-e5357c7116bf.png)

Most changes were on css. I did also change the js file from yours to add two other tag choices: yellow and gray (so reset to gray... otherwise once a color was chosen, it was stuck).

You can decide if you like the styling better or not. I got rid of bold weights, placed the colors (especially the tag colors) on equally-spaced locations / patterns on the color wheel, etc.

The good thing is (at the moment) that it can be automerged :smile: (assuming no other non-pushed changes in master)

Have a nice day

Andy