Settings now display when importer is scheduled

Settings now display when importer is scheduled.  Additionally, removed
bottom schedule button.
message displays if post thumbnails disabled

A message will display on the importer page if version is 2.9 or above
and post thumbnails aren't supported by the theme.

Decided to not add the code to support them to the plugin because issues
could arise if the plugin was disabled or removed.
Close #10 - fixed pre tag
Add support for Yoast SEO title via htmlTitle tag
Fix markup in options

That's just sloppy.
Fix hanging div
Move warning div inside conditional

Prevents bordered div from appearing when no warning is raised.
Restore PHP tag to echo
Increment version number

1.3.3 -> 1.3.4
Merge pull request #12 from ContentLEAD/next

Merge changes for 1.3.4