Merge pull request #1 from per1234/per1234-valid-category

Valid library.properties category value

Author: devinaconley

Plotter/library.properties

@@ -4,6 +4,6 @@ author=Devin Conley <devinconley@jhu.edu>
 maintainer=Devin Conley <devinconley@jhu.edu>
 sentence=an Arduino library for easy plotting using Processing via serial communication.
 paragraph=Supports multi-variable plots against time as well as 2D plotting of an X vs Y variable. Multiple graphs can be displayed at once, will all formatting and scaling handled automatically. Various listener options are provided, including stand-alone options so that the Processing software does NOT need to be downloaded. The listener requires no modification; just start the program.
-category=Graphing Data
+category=Data Processing
 url=https://github.com/devinconley/ArduinoPlotter
 architectures=*