Update to use Bootstrap beta release

FEDX-375

package.json

@@ -10,7 +10,7 @@
     "backbone.paginator": "~2.0.3",
     "coffee-loader": "^0.7.3",
     "coffee-script": "1.6.1",
-    "edx-bootstrap": "~0.1.7",
+    "edx-bootstrap": "^0.2.1",
     "edx-pattern-library": "0.18.1",
     "edx-ui-toolkit": "1.5.2",
     "exports-loader": "^0.6.4",
@@ -22,6 +22,7 @@
     "moment": "^2.15.1",
     "moment-timezone": "~0.5.5",
     "picturefill": "~3.0.2",
+    "popper.js": "~1.12.5",
     "prop-types": "^15.5.10",
     "raw-loader": "^0.5.1",
     "react": "^15.5.4",