replaced 'exists' with 'identical'; made path creation a bit more cross-platform
replaced 'exists' with 'identical'; made path creation a bit more cross-platform

--HG--
extra : convert_revision : svn%3A177060d3-6165-4ab0-95eb-642399a075a8/trunk%4078

remko/nanoc,nanoc/nanoc,hilohiro/nanoc,legallybrown/nanoc,gjtorikian/nanoc,barraq/nanoc,RubenVerborgh/nanoc