Bug#1222698 fix and enhanced note display

Shifted loading of GEDFact_assistant/css/cens_style.css from function formatCensusNote() to the theme header.php as the note css is required in a number of places. Also took opportunity to amend code in function print_note_record() to remove need for a < br > in the note text to act as a marker for when the header line is to be turned into a link (so display is consistent everywhere) also picked up potential logic error (call getNote() for a null WT_Note) and corrected display of shared notes created outside census assistant

Of course a simpler solution to the css loading may be to put the relevant lines (.note_*) into each theme css file