first implementation of protobuf

restructure in client server model
loads of work still missing

ledd/db_helper.py

@@ -0,0 +1,22 @@
+DB_VERSION = 1
+
+
+def check_db(conn):
+    cur = conn.cursor()
+
+    cur.execute("SELECT value FROM meta WHERE name='version'")
+
+    ver = cur.fetchone()
+    if ver:
+        ver = int(ver)
+
+        if ver < DB_VERSION:
+            upgrade_db(conn, ver, DB_VERSION)
+    else:
+        with open('sql/ledd.sql', 'r') as f:
+            cur.executescript(f.read())
+            conn.commit()
+
+
+def upgrade_db(conn, old, new):
+    pass