Merge tag 'v07' into develop

v07
Added image replacement to site credits
Made super large headings responsive. Fixes #33
Added pointer events mixin. Closes #32.
Added headings mixing. Closes #31.
Added display block to containers. Corrected to use modern clearfix in compass. Closes #30
Fix max-width bug in IE8. Closes #29.
Removed inline-block from img base class. Fixed #28.
Added aligncenter class. Closes #27
Bumped version
Merge branch 'release/v08'