Use consistent naming conventions (no extensions in scripts)

In order to not break existing user's configs, symbolic
links with the old names are introduced

battery/README.md

@@ -22,7 +22,7 @@ To use with i3blocks, copy the blocklet configuration in the given `i3blocks.con
 
 ```INI
 [battery]
-command=$SCRIPT_DIR/battery.py
+command=$SCRIPT_DIR/battery
 markup=pango
 interval=30
 ```

battery/battery

@@ -0,0 +1,87 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2016 James Murphy
+# Licensed under the GPL version 2 only
+#
+# A battery indicator blocklet script for i3blocks
+
+from subprocess import check_output
+
+status = check_output(['acpi'], universal_newlines=True)
+
+if not status:
+    # stands for no battery found
+    fulltext = "<span color='red'><span font='FontAwesome'>\uf00d \uf240</span></span>"
+    percentleft = 100
+else:
+    # if there is more than one battery in one laptop, the percentage left is 
+    # available for each battery separately, although state and remaining 
+    # time for overall block is shown in the status of the first battery 
+    batteries = status.split("\n")
+    state_batteries=[]
+    commasplitstatus_batteries=[]
+    percentleft_batteries=[]
+    for battery in batteries:
+        if battery!='':
+            state_batteries.append(battery.split(": ")[1].split(", ")[0])
+            commasplitstatus = battery.split(", ")
+            percentleft_batteries.append(int(commasplitstatus[1].rstrip("%\n")))
+            commasplitstatus_batteries.append(commasplitstatus)
+    state = state_batteries[0]
+    commasplitstatus = commasplitstatus_batteries[0]
+    percentleft = int(sum(percentleft_batteries)/len(percentleft_batteries))
+
+    # stands for charging
+    FA_LIGHTNING = "<span color='yellow'><span font='FontAwesome'>\uf0e7</span></span>"
+
+    # stands for plugged in
+    FA_PLUG = "<span font='FontAwesome'>\uf1e6</span>"
+
+    # stands for using battery
+    FA_BATTERY = "<span font='FontAwesome'>\uf240</span>"
+
+    # stands for unknown status of battery
+    FA_QUESTION = "<span font='FontAwesome'>\uf128</span>"
+
+    timeleft = ""
+
+    if state == "Discharging":
+        time = commasplitstatus[-1].split()[0]
+        time = ":".join(time.split(":")[0:2])
+        timeleft = " ({})".format(time)
+        fulltext = FA_BATTERY + " "
+    elif state == "Full":
+        fulltext = FA_PLUG + " "
+    elif state == "Unknown":
+        fulltext = FA_QUESTION + " " + FA_BATTERY + " "
+    else:
+        fulltext = FA_LIGHTNING + " " + FA_PLUG + " "
+
+    def color(percent):
+        if percent < 10:
+            # exit code 33 will turn background red
+            return "#FFFFFF"
+        if percent < 20:
+            return "#FF3300"
+        if percent < 30:
+            return "#FF6600"
+        if percent < 40:
+            return "#FF9900"
+        if percent < 50:
+            return "#FFCC00"
+        if percent < 60:
+            return "#FFFF00"
+        if percent < 70:
+            return "#FFFF33"
+        if percent < 80:
+            return "#FFFF66"
+        return "#FFFFFF"
+
+    form =  '<span color="{}">{}%</span>'
+    fulltext += form.format(color(percentleft), percentleft)
+    fulltext += timeleft
+
+print(fulltext)
+print(fulltext)
+if percentleft < 10:
+    exit(33)

battery/battery.py

@@ -0,0 +1 @@
+battery

battery/i3blocks.conf

@@ -1,4 +1,4 @@
 [battery]
-command=$SCRIPT_DIR/battery.py
+command=$SCRIPT_DIR/battery
 markup=pango
 interval=30

monitor_manager/README.md

@@ -17,7 +17,7 @@ Add the following to your i3blocks config:
 
 ```
 [monitors]
-command=$SCRIPT_DIR/monitor_manager.py
+command=$SCRIPT_DIR/monitor_manager
 interval=once
 ```