Updating and optimizing code

First of all great work on this.  I have been looking for a while to find someone that has started a good set of scraping code for college football.  The biggest change that I have implemented thus far is changing your tableNode objects so you don't have to subset them with hard codes.  Take a look at my changes in rankings.R so you get some context.  I also modified the paths that you were using when you saved out a file.  This shouldn't be a problem if you are still using the .Rproj but may cause issues in sublime.  There are a various small issues that I fixed that was breaking the code.  Let me know if you have questions.  Likely more to come but I didn't want to overwhelm you...