[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/core/git.py

@@ -0,0 +1,77 @@
+# pylint: disable=C0111,R0903
+
+"""Print the branch and git status for the
+currently focused window.
+
+Requires:
+    * xcwd
+    * Python module 'pygit2'
+"""
+
+import os
+import pygit2
+
+import core.module
+
+import util.cli
+
+
+class Module(core.module.Module):
+    def __init__(self, config, theme):
+        super().__init__(config, theme, [])
+
+        self.__error = False
+
+    def hidden(self):
+        return self.__error
+
+    def update(self):
+        state = {}
+        self.clear_widgets()
+        try:
+            directory = util.cli.execute("xcwd").strip()
+            directory = self.__get_git_root(directory)
+            repo = pygit2.Repository(directory)
+
+            self.add_widget(name="git.main", full_text=repo.head.shorthand)
+
+            for filepath, flags in repo.status().items():
+                if (
+                    flags == pygit2.GIT_STATUS_WT_NEW
+                    or flags == pygit2.GIT_STATUS_INDEX_NEW
+                ):
+                    state["new"] = True
+                if (
+                    flags == pygit2.GIT_STATUS_WT_DELETED
+                    or flags == pygit2.GIT_STATUS_INDEX_DELETED
+                ):
+                    state["deleted"] = True
+                if (
+                    flags == pygit2.GIT_STATUS_WT_MODIFIED
+                    or flags == pygit2.GIT_STATUS_INDEX_MODIFIED
+                ):
+                    state["modified"] = True
+            self.__error = False
+            if "new" in state:
+                self.add_widget(name="git.new")
+            if "modified" in state:
+                self.add_widget(name="git.modified")
+            if "deleted" in state:
+                self.add_widget(name="git.deleted")
+
+
+        except Exception as e:
+            self.__error = True
+
+    def state(self, widget):
+        return widget.name.split(".")[1]
+
+    def __get_git_root(self, directory):
+        while len(directory) > 1:
+            if os.path.exists(os.path.join(directory, ".git")):
+                return directory
+            directory = "/".join(directory.split("/")[0:-1])
+        return "/"
+
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4