Updated nokogiri to 1.6.0
Updated nokogiri to 1.6.0

Testing reveals no further changes were needed other than to update the gemspec.

Signed-off-by: Nathan Lowrie <4f3407de78bccc8cc160ee4d278d5efe7162e6b5@finelineautomation.com>

tdenovan/odf-report,yeti-switch/odf-report,dsthode/odf-report,driehuis/odf-report,sandrods/odf-report