Add party-based performance from last general election

While knowing who they actually endorsed in the primary would allow the strongest indicator of performance (when compared against election results), we can at least assume the democrats endorsed the democrats in the general election in the meantime.

Easiest way to do this
1. Visit [BallotBoxApp](http://www.philadelphiavotes.com/en/resources-a-data/ballot-box-app)
2. Select `2014 General` and `Governor and Lieutenant Governor`
3. Select Ward `1`
4. Copy the % for the democratic candidate into the democratic ward leader's `Results` column and the % for the republican candidate into the republican ward leader's column in the spreadsheet
5. Repeat for the other wards (there are 66)