nav fixes; max width on content
add Isotope vs Masonry vs Packery in readme
remove pkgd grunt tasks for building pkgd files
Ref #613
update to beta 10
last remaining codepen links
JS fixes for IE8; use buttons for hero demo
page <meta> tags
vertical demo use buttons
data-filter, sortByValue
add select option
select and radio input example;
Fixes desandro/isotope#618