Format legend value to billion, million or thousand
Merge remote-tracking branch 'hello/master' into legend_values

* hello/master:
  Format legend value to billion, million or thousand
a few changes to nicer legend values

B -> billion
M -> million
K - as "thousand" is longer than "000" I skip that case.
Merge branch 'master' of github.com:trademapper/trademapper-js

* 'master' of github.com:trademapper/trademapper-js:
  Delete trademapper2.png
  Create trademapper2.png