Problem:  Adding a bootstrap app inside a page viewer web part in SP2010 causes the formatting to be messed up.

Reason:  SP 2010 does not have the right compatibility mode required on the master page.

Solution: Open the site in SharePoint Designer

Copy the v.4 master page for the site to a new master page and add the following line as the first “meta” tag:

 <meta http-equiv=”X-UA-Compatible” content=”IE=10″ />

Click save as default master page on the ribbon.  Keep in mind this applies to all pages to the site.