Fix cropped labels

[jerbaroo]

[jerbaroo]

Rather than fix the cropping issue I was looking at chancing the label so it fits. In chartjs 2.0 beta2 you can change the default labels for units of time e.g. change year to 'YY'. However I can't seem to get it working, it's possibly broken.

Example code.

Another user suggesting they can't get it working here.

[jerbaroo]

Even some short labels don't fit depending on the data in the graph it seems. For example displaying labels as mm/yy works for the repo joeoh/gitmystats for the graph type commits per week however it doesn't work for the repo torvalds/linux.

It seems we'll have to actually fix the cropping problem rather than use the shorter labels workaround.