feat(bhInfo): popovers made simple

[jniles]

This commit creates a bhInfo component that is simply a wrapper for popovers. Since this is a component, these popovers cannot have any knowledge of their parent scope. This component is ideal for informational popovers that only contain $translate filters.

The API is described in #525. For reference, here is an example usage:

<bh-info template="typePopover.tmpl.html" direction="right"></bh-info>

Closes #525.

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[sfount]

This make the module mark-up much cleaner! LGTM.