Update Traceur(0.0.61) and add Windows fixes

Hi, I updated Traceur to the last version (0.0.61) and fixed the sourcemaps and the tests for Windows users. :)
I am not really sure where this come from but the test does not pass if i don't do `sourceMap.sourcesContent[0] = sourceMap.sourcesContent[0].replace(/\r/gm, '')` on Windows. So  there are CLRFs in the output.