Added db query interface and moved memory database

memory_database.go

@@ -0,0 +1,25 @@
+package main
+
+import (
+)
+
+/*
+ * This is a test memory database. Do not use for any production it does not get persisted
+ */
+type MemDatabase struct {
+  db      map[string][]byte
+}
+
+func NewMemDatabase() (*MemDatabase, error) {
+  db := &MemDatabase{db: make(map[string][]byte)}
+
+  return db, nil
+}
+
+func (db *MemDatabase) Put(key []byte, value []byte) {
+  db.db[string(key)] = value
+}
+
+func (db *MemDatabase) Get(key []byte) ([]byte, error) {
+  return db.db[string(key)], nil
+}