Update design-principles.md

bolded the tagline for each principle
Merge pull request #56 from ascott1/gh-pages

Use .md in place of HTML for photography page
starting to format Illustration page
Update effective-forms.md

added a bunch of content
merging upstream
Merge pull request #54 from benguhin/patch-3

Update design-principles.md
Merge pull request #57 from benguhin/patch-4

Update effective-forms.md
Quick formatting fix on Minicons page
formatting layout for Illustration and Video pages
merging upstream
Merge pull request #58 from Scotchester/gh-pages

Quick formatting fix on Minicons page
resolving conflict
Merge pull request #59 from iuloshi/gh-pages

Formatted Illustration and Video pages
render HTML with Kramdown
Merge remote-tracking branch 'upstream/gh-pages' into gh-pages