Return a warning if no character set specified
Merge pull request #18 from theodi/feature-error-if-no-charset

Return a warning if no character set specified
Return headers
Merge pull request #19 from theodi/feature-return-headers

Return headers
Merge branch 'master' of github.com:theodi/csvlint.rb into ignore-query-params

Conflicts:
	features/validation_warnings.feature
	lib/csvlint.rb