change not_tested attribute to a magic comment
colorize warning for 100 columns
fix formatting and spacing
fix rand imports from extern to std
Merge pull request #125 from jschaf/tweak-build

colorize warning for 100 columns
Merge pull request #126 from jschaf/fix-imports

Fix rand imports and some long lines
Fix build errors
Fix merge conflicts
Merge branch 'jschaf-not-tested-comment'