Aditya Parab 7b8e0fa522 docs(@angular/cli): update story for global lib to show correct bootstrap4
configuration

- update bootstrap4 url to point to correct page
- remove tether import in .angular-cli.json
- add umd version popper.js import in .angular-cli.json instead of tether

Closes #7584
2017-09-05 11:17:25 +01:00
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