Improved formatting for text/html view of fcr:nodetypes.
Updated views to remove inline common javascript and css.
Updated the 'import' button for consistent styling.
Added visual indicator for expandable/collapsible headings.
Added panel-title class to headers within panel-heading divs.
Moved transaction control to main navigation bar.
Made language more consistent and clear in html view.
Added support for wildcard accept headers to accomodate deficiencies in HtmlUnit web client.
Merge pull request #638 from mikedurbin/html-view-issues

Html view issues

Resolves: https://www.pivotaltracker.com/story/show/82427716