Strange X limits
Hey I'm having some weird behavior in the notebook... I just hacked together some code that supposed to poll a temp/humidity sensor 60 times and then plot the temp against time. Instead of getting a nicely formatted x axis I'm just getting a straight line, and then all the dates from 2010 to 2016 as the x axis. Any ideas? Here's a screencap. 
![pandasgoof](https://cloud.githubusercontent.com/assets/6879573/4781998/561769ba-5cd1-11e4-97aa-0f2edaf39184.png)
