Fixed crash in Chrome by using a object URL created from a Blob. In my b...

...rief testing, it now successfully exports .csv files 13,000+ lines and  18 columns.

Tested in the latest Chrome and Firefox.

Updated unit tests to expect output that is not encoded.

The current stable version of PhantomJS doesn't support blob, so I modified the karma config to use Chrome until PhantomJS 2.0 is released.