fix doxygen formatting

reformat a couple of places in the doxygen comments manually (broken
@image lines etc.). This is mostly to make wrapcomments.py happy.
update wrapcomments.py

now handle @image tags correctly
remove stray comment
put @ref in separate line
force @ref in separate line
fix more files
fix up more files
fix warpcomments.py
format everything
more fixup
fixup files
Merge pull request #379 from tjhei/doxygen_wrapcomments_fixes

Doxygen wrapcomments fixes