lemonbar: Find and launch all modules at runtime

.i3/lemonbar/i3_lemonbar_common.py

@@ -26,6 +26,9 @@ class bar_mode(Enum):
 mode = bar_mode.normal
 
 # Helper functions
+def hostname():
+    return os.uname()[1]
+
 ansi_escape = re.compile(r'(\x9B|\x1B\[)[0-?]*[ -/]*[@-~]')
 def strip_ansi_unicode(s):
     # ANSI escape sequences are for colors in terminal and similar