Let 1.8 fail
Merge pull request #155 from gemhome/let_it_fail

Let 1.8 fail
Revert "Merge pull request #147 from mockdeep/simplecov"

This reverts commit 2b91e03fdf382a61cfac3c59d4c57f5dc41de836, reversing
changes made to e587bdc6710dfcd457ea439ef14bdf22a93ba8b6.
Remove all require_relatives
Add SimpleCov
Fix hard-coded ruby path
Simplify minimum required ImageMagick version checking
Fix test load paths