index.html:
* remove type="text/css" since it's not needed anymore
* use double quotes for consistency
* specify image dimensions
ignore all .DS_Store files
remove trailing spaces
index.html: reindent
rename the images folder to img
fix a few JSHint warnings
update jQuery to 1.8.3, jQuery UI to v1.10.1 and jquery smooth-scroll to v1.4.10
index.html: move rel="stylesheet" after link for consistency
README.markdown: cosmetic changes