Adds ajax router for sending tweets to the client
Changes scatterplot to a line graph
Averages sentiment scores between it's 4 nearest neighbors
Changes the stream controller to only store tweets with a non zero sentiment score, and squashes sentiment scores by a time interval in the sentiment graph
Removes the dialog box from the sentiment graph
Sets a static y scale from -5 to 5
Adds baseline and labels
Cleans up css file
Merge branch 'upgradeGraph' into dev