refactored content classes for grid columns
formatting layoutof Identity > Isocons page > Asset Library section
Identity > Isocons > Asset library: scaled down isocons, made isocon headings h4, removed rules between cols
removed border-left/right: 0 on .content-75, per Scott's code review of PR
Merge pull request #93 from iuloshi/gh-pages

Formatted Identity > Isocon page > Asset Library section