[modules/datetime] Re-enable datetime module

Add datetime module + aliases date and time.

see #23

bumblebee/modules/datetime.py

@@ -0,0 +1,31 @@
+# pylint: disable=C0111,R0903
+
+"""Displays the current time, using the optional format string as input for strftime."""
+
+from __future__ import absolute_import
+import datetime
+import bumblebee.engine
+
+def default_format(module):
+    default = "%x %X"
+    if module == "date":
+        default = "%x"
+    if module == "time":
+        default = "%X"
+    return default
+
+class Module(bumblebee.engine.Module):
+    def __init__(self, engine):
+        super(Module, self).__init__(engine,
+            bumblebee.output.Widget(full_text=self.get_time)
+        )
+        module = self.__module__.split(".")[-1]
+
+        self._fmt = default_format(module)
+
+#        self._fmt = self._config.parameter("format", default_format(module))
+
+    def get_time(self):
+        return datetime.datetime.now().strftime(self._fmt)
+
+# vim: tabstop=8 expandtab shiftwidth=4 softtabstop=4