* adding local pagination to bucket list
When there are more than 5000 buckets, browser ui
becomes unresponsive since react needs to create
5000 elements which takes browser resources.
So we show only 100 buckets for the first time,
and load more buckets when the user is scrolling down.
* move inline styles to less file
- upgraded react from v16.2.0
- upgraded react-router to v4.2.0 and re-writen the routes
- using prettier to format the code
- added jest to unit test components/reducers/selectors
This provides a skeleton to start of with. Only basic unit test
cases are added, remaining needs to be added.
In terms of functionality, it provides login, listing and searching
buckets. Remaining functionalities will be added in upcoming patches.