Refactor shared code in the render methods.

Both renderSensitive() and renderInsensitive() displayed the same internal block of code, just wrapped in a different SwatHtmlTag. Move this contnent into a new renderContent() method. Structuring it like this both reduces duplicate code, and helps with writing customized subclasses that want to render extra content.
Merge pull request #32 from isaacgrant/admin-title-link-flexibility

Refactor shared code in the render methods.