Merge pull request #145 from Chunjie/master

[PT 49574045] job opening chart
use the original bootstrap library instead of gem version
Merge pull request #146 from whywhy36/switch_bootstrap

use the original bootstrap library instead of gem version
fix scss import error
Merge pull request #147 from whywhy36/switch_bootstrap

fix scss import error
charts for dashboard

  [PT 49574083] interview chart
  [PT 49574095] offer chart