Completely overhauled.
demo modifications
re-scaffolding project, add nmp, add/config grunt
re-scafolding, grunt for css
debug scrollTo a non-integer section step number using mousewheel
remove useless context variable
change ie8 to lt9
rename js file
Debug IE<9 freezing using mousewheel
debug jslint
back to tab indent
version 0.4.0
update ReadMe