adde battery and archlinux plugin

plugins/battery/battery.plugin.zsh

@@ -0,0 +1,59 @@
+#!/bin/sh
+
+##defining path of battery
+if [ -e /proc/acpi/battery/BAT0/ ] 
+        then 
+        battpath="/proc/acpi/battery/BAT0" 
+elif [ -e /proc/acpi/battery/BAT1/ ] 
+        then 
+        battpath="/proc/acpi/battery/BAT1" 
+else 
+        echo "No battery found. Make sure that you have acpi support in your kernel" 
+        echo "and that the computer actually is a laptop :)" 
+        exit 1 
+fi
+batt_prompt_perc(){
+fullcap=`grep "^last full capacity" $battpath/info | awk '{ print $4 }'`
+remcap=`grep "^remaining capacity" $battpath/state | awk '{ print $3 }'`
+
+charge=$(( $remcap * 100 / $fullcap  ))
+
+# prevent a charge of more than 100% displaying
+if [ "$charge" -gt "99" ]
+	then
+   		charge=100
+fi
+
+color="red"
+if [ $charge -gt "80" ]
+	then 
+		color="cyan"
+elif [ $charge -gt 60 ]
+	then	
+		color="green"
+elif [ $charge -gt 25 ]
+	then
+		color="yellow"
+fi
+
+echo -e "%F{$color}$charge%f"
+}
+
+bat_prompt_acstt(){
+batstate=`grep "^charging state" $battpath/state | awk '{ print $3 }'`
+case "${batstate}" in
+   'charged')
+  	 clr="green"
+   	 btst="°"
+   ;;
+   'charging')
+   	clr="blue"
+   	btst="+"
+   ;;
+   'discharging')
+   	clr="yellow"
+   	btst="-"
+   ;;
+esac
+echo -e "%F{$clr}$btst%f"
+}