Added group of robot images to work page

The three robot images are wrapped in a div which uses max-width of 40%
and floated to the right using pull-right. The secondary images are
placed alongside each other using display inline-block and the right one
is set to pull-right. Their size is restricted using max-width 46%. All
three images use the img-responsive class.

The bootstrap thumbnail class is not used since it does not work
correctly with the max-width properties.
Added QA internship image
Added work information in tables

Using tables allows the work information text to be lined up easily and
lets the text wrap underneath for smaller width viewports
Added sizing and spacing changes for work page