Update plugin descriptions and minor xp drop bugfix

plugin-playground/src/main/kotlin/SlayerTrackerPlugin/plugin.kt

@@ -9,6 +9,10 @@ import rt4.Sprite
 import java.awt.Color
 import java.lang.Exception
 
+/**
+ * Very simple slayer task tracker
+ * @author Ceikry
+ */
 class plugin : Plugin() {
     val boxColor = 6116423
     val posX = 5

plugin-playground/src/main/kotlin/SlayerTrackerPlugin/plugin.properties

@@ -1,4 +1,3 @@
-
-AUTHOR='Me'
-DESCRIPTION='Make sure to rename both the MyPlugin folder and the package statement in plugin.java!
-VERSION=-1.1
+AUTHOR='Ceikry'
+DESCRIPTION='Helps to keep track of kills remaining on a slayer task.'
+VERSION=1.1