Features
--------
-- Battery percentage/state
+- Battery percentage/state/time left
- CPU usage
- CPU frequency
- Custom shell commands
- Kernel version
- Keyboard indicators
- Load average
+- Network speeds (RX and TX)
- Number of files in a directory (hint: Maildir)
- Memory status (free memory, percentage, total memory and used memory)
- Swap status (free swap, percentage, total swap and used swap)