[core] restructure to allow PIP packaging

OK - so I have to admit I *hate* the fact that PIP seems to require a
subdirectory named like the library.

But since the PIP package is something really nifty to have (thanks to
@tony again!!!), I updated the codebase to hopefully conform with what
PIP expects. Testruns so far look promising...

bumblebee_status/modules/contrib/indicator.py

@@ -0,0 +1,62 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the indicator status, for numlock, scrolllock and capslock 
+
+Parameters:
+    * indicator.include: Comma-separated list of interface prefixes to include (defaults to 'numlock,capslock')
+    * indicator.signalstype: If you want the signali type color to be 'critical' or 'warning' (defaults to 'warning')
+
+contributed by `freed00m <https://github.com/freed00m>`_ - many thanks!
+"""
+
+import core.module
+
+import util.cli
+import util.format
+
+
+class Module(core.module.Module):
+    def __init__(self, config, theme):
+        super().__init__(config, theme, [])
+
+        self.__include = tuple(
+            filter(
+                len, util.format.aslist(self.parameter("include", "NumLock,CapsLock"))
+            )
+        )
+        self.__signalType = (
+            self.parameter("signaltype")
+            if not self.parameter("signaltype") is None
+            else "warning"
+        )
+
+    def update(self):
+        status_line = ""
+        for line in (
+            util.cli.execute("xset q", ignore_errors=True).replace(" ", "").split("\n")
+        ):
+            if "capslock" in line.lower():
+                status_line = line
+                break
+        for indicator in self.__include:
+            widget = self.widget(indicator)
+            if not widget:
+                widget = self.add_widget(name=indicator, full_text=indicator)
+
+            widget.set(
+                "status",
+                True
+                if "{}:on".format(indicator.lower()) in status_line.lower()
+                else False,
+            )
+
+    def state(self, widget):
+        states = []
+        if widget.get("status", False):
+            states.append(self.__signalType)
+        else:
+            states.append("normal")
+        return states
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4