LPS-40606 OpenSocial Gadget Publisher needs Bootstrap

Original pull request: https://github.com/noellekimiko/liferay-plugins/pull/6
* Won't build on my machine -- says the compile failed. Probably a problem with my bundle, not the fix, but didn't have time to check
* Maybe not the best approach: see comments in https://github.com/liferay/liferay-plugins/pull/157