Bump bower version of pre-stable release

bower.json

@@ -19,8 +19,8 @@
     "bootstrap": "^3.3.7",
     "moment": "^2.10",
     "eonasdan-bootstrap-datetimepicker": "^4.17",
-    "gettext.js": "^0.5",
-    "c3": "^0.6",
+    "gettext.js": "^0.7",
+    "c3": "^0.7",
     "papaparse": "^5.0",
     "fullcalendar": "^3.10.2",
     "mousetrap": "^1.6",