Rearrange the models files into the respective levels, add DB layout for skills storage

eve_api/models/__init__.py

@@ -3,4 +3,24 @@ By importing all of these sub-modules, the models package is transparently
 accessible by the rest of the project. This makes it act just as if it were
 one monolithic models.py.
 """
-from api_player import *
+
+from django.db import models
+
+class EVEAPIModel(models.Model):
+    """
+    A simple abstract base class to set some consistent fields on the models
+    that are updated from the EVE API.
+    """
+    api_last_updated = models.DateTimeField(blank=True, null=True,
+                                            verbose_name="Time last updated from API",
+                                            help_text="When this object was last updated from the EVE API.")
+
+    class Meta:
+        abstract = True
+
+
+from static import *
+from account import *
+from character import *
+from corporation import *
+from alliance import *