update
add targhet for doc
del old tiddler file
move version info to utils, rename err_cd to log_cb, init viewPort in S52_init
rename err_cb to log_cb
code clean up
add version info, log_cb
add S52_utils_version()
code clean up
update to tiddlyWiki5
remove superfluous S52_setViewPort
remove superfluous S52_setViewPort
remove superfluous S52_setViewPort
remove superfluous S52_setViewPort