[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/http_status.py

@@ -0,0 +1,70 @@
+# pylint: disable=C0111,R0903
+
+"""Display HTTP status code
+
+Parameters:
+    * http__status.label: Prefix label (optional)
+    * http__status.target: Target to retrieve the HTTP status from
+    * http__status.expect: Expected HTTP status
+
+contributed by `valkheim <https://github.com/valkheim>`_ - many thanks!
+"""
+
+from requests import head
+
+import psutil
+
+import core.module
+import core.widget
+import core.decorators
+
+
+class Module(core.module.Module):
+    UNK = "UNK"
+
+    @core.decorators.every(seconds=30)
+    def __init__(self, config, theme):
+        super().__init__(config, theme, core.widget.Widget(self.output))
+
+        self.__label = self.parameter("label")
+        self.__target = self.parameter("target")
+        self.__expect = self.parameter("expect", "200")
+
+    def labelize(self, s):
+        if self.__label is None:
+            return s
+        return "{}: {}".format(self.__label, s)
+
+    def getStatus(self):
+        try:
+            res = head(self.__target)
+        except Exception as e:
+            print(e)
+            return self.UNK
+        else:
+            status = str(res.status_code)
+            return status
+
+    def getOutput(self):
+        if self.__status == self.__expect:
+            return self.labelize(self.__status)
+        else:
+            reason = " != {}".format(self.__expect)
+            return self.labelize("{}{}".format(self.__status, reason))
+
+    def output(self, widget):
+        return self.__output
+
+    def update(self):
+        self.__status = self.getStatus()
+        self.__output = self.getOutput()
+
+    def state(self, widget):
+        if self.__status == self.UNK:
+            return "warning"
+        if self.__status != self.__expect:
+            return "critical"
+        return self.__output
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4