[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/hostname.py

@@ -0,0 +1,28 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the system hostname.
+
+contributed by `varkokonyi <https://github.com/varkokonyi>`_ - many thanks!
+"""
+
+import platform
+
+import core.module
+import core.widget
+import core.decorators
+
+
+class Module(core.module.Module):
+    @core.decorators.every(minutes=60)
+    def __init__(self, config, theme):
+        super().__init__(config, theme, core.widget.Widget(self.output))
+        self.__hname = ""
+
+    def output(self, _):
+        return self.__hname + " " + "\uf233"
+
+    def update(self):
+        self.__hname = platform.node()
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4