outputting full path when file does not parse
test the path, not the parts
stick to good coding standards
no good reason for making 'name' an instance variable
Add a CONTRIBUTING file

This uses the content of the 'Contribute' wiki page.
Merge pull request #746 from mattr-/contributor-guidelines

Add a CONTRIBUTING file
Merge pull request #745 from erictheise/master

output full path & name for files that don't parse
Added space between arguments in Convertible errors
Merge remote-tracking branch 'jekyll/master'