CartoDB/cartodb — pull request #868 by rafatower (2014-10-13 10:56:25+00:00)
Title: CDB-4352 Use xlsx2csv instead of Roo to import xlsx

Make the necessary changes to the importer in order to import Excel xlsx
files faster by using the python script xlsx2csv instead of Ruby Roo
gem.

@Kartones can you please review?