add license

LICENSE

+Layout manager for antonok's custom keyboard
+Copyright (C) 2017  Anton Lazarev
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.

README.md

@@ -13,3 +13,6 @@ kb-layout-manager provides a clean, modern, and intuitive method for editing and
 On its own, a web interface has no way of interfacing with the computer's filesystem, compiling C code, or flashing firmware to hardware.
 The backend server for kb-layout-manager is written in NodeJS and is meant to be run locally on the user's computer, allowing automatic file loading, backups, compilation, and firmware flashing.
 The web client uses websockets to automatically connect to the server whenever it is running.
+
+## license
+kb-layout-manager is licensed under GPLv3. See LICENSE for more information.