[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/timetz.py

@@ -0,0 +1,23 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the current date and time.
+
+Parameters:
+    * time.format: strftime()-compatible formatting string
+    * time.locale: locale to use rather than the system default
+"""
+
+import core.decorators
+from .datetimetz import Module
+
+
+class Module(Module):
+    @core.decorators.every(seconds=59)  # ensures one update per minute
+    def __init__(self, config, theme):
+        super().__init__(config, theme)
+
+    def default_format(self):
+        return "%X %Z"
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4