Hi Bob,
its just a matter of css so you can include bootstrap.css file in your shared.html and can use the components. I just had to design the menu add-on because bootstrap menu uses different css classes. Yes you can use all other components. In our company we almost have shifted to agiletoolkit now and we have delivered more then 20 projects on agile. a few of them have more then 50+ models and very complex relations, so now I am able to say yes. you can do almost everything in agile, your imagination is the limit.
Steps:
download bootstrap.css and include it in your css
use xavoc-addons/boot/menu to create your menu as per
https://github.com/xavocinternational/atk4-boot-template