Changing to output 100% for full battery on OS X.

This commit ensures that `battery_percentage` has the same output
on both Linux and OS X. Thanks @jfmcarreira for finding this!

plugins/available/battery.plugin.bash

@@ -52,7 +52,7 @@ battery_percentage(){
     local IOREG_OUTPUT=$(ioreg -n AppleSmartBattery -r | awk '$1~/Capacity/{c[$1]=$3} END{OFMT="%05.2f%%"; max=c["\"MaxCapacity\""]; print (max>0? 100*c["\"CurrentCapacity\""]/max: "?")}')
     case $IOREG_OUTPUT in
       100*)
-        echo '99'
+        echo '100'
         ;;
       *)
         echo $IOREG_OUTPUT | head -c 2