added script for creation of migrations

create_migration.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+epoch="$(date +%s)"
+[ -f $1 ] && echo "Please provide a name for the migration" && exit 1
+migration_name=$1
+migration=${epoch}_${migration_name}
+
+$(cat <<EOF > db/migrations/$migration.h
+#pragma once
+
+namespace db {
+  namespace migrations {
+    namespace db_builder = db::migrations::builder;
+
+    class m$migration : public Migration {
+      public:
+      m$migration() : Migration() {
+        db_builder::Table $migration_name = db_builder::Table::
+
+        m_statement = $migration_name.str();
+      }
+    };
+  }
+}
+EOF
+)
+
+include="#include \"migrations/$migration.h\""
+map_entry="migrations.emplace($epoch, new db::migrations::m$migration());"
+echo $include
+echo $map_entry