Add documentation and source

Added documentation, source and extra files.

source/orm/library/admin/genre.py

@@ -0,0 +1,14 @@
+from django.contrib import admin
+
+from library.models import Genre
+
+
+@admin.register(Genre)
+class GenreAdmin(admin.ModelAdmin):
+    """
+    Admin for book genres.
+
+    """
+
+    list_display = ["id", "uuid", "code_name", "name"]
+    list_per_page = 25