Fix typo in Canadensys name

Hi @martingraham, just discovered your paper on [Vesper](http://doi.org/10.1016/j.ecoinf.2014.08.004). Great that you were using Canadensys resources!

I did notice a typo in the name. It is `Canadensys`, not `Candensys` (appears in tables and acknowledgements). I noticed the typo in the software too, so here's a pull request to correct it. Do you think it is possible to correct this in the paper as well? And if corrections in the paper are allowed, it would be great for the dataset publishers if a reference were included to the dataset itself. For Canadensys datasets, it is even possible to include a DOI and to link to a specific version of the dataset (i.e. the one with the data quality issues you were using). I'm cc-ing @cgendreau and @dshorthouse for more info.