Figures displayed on scatter plot

Fixed #74 

### Specification
- images on runs or analyzers are shown in scatter plot
- more larger image pops up when mouse is over the image
- the size of image is selectable in ["point"=>{width: 0px}, "middle"=>{width: 56px}, "large"=>{width: 112px}]
  - buttons to change the image size are put on the right of each plot("show small image", "show large image")