Remove right alignment for section headings

The right alignments makes it difficult to find the section changes when
the window is very wide.  Now they stay left but are indented to make
them special.
Remove text shadow for page headings
Remove images from methods and attributes

The large text and visual styling seem sufficient to determine where
each method and attribute begins.
Remove superscript from attribute [RW] indicator

The text is too small and it doesn't look good as large text
superscript, so remove that too.  Some whitespace was added to
distinguish it from a method's argument list.