Add Licence.md

Signed-off-by: Imhotheb <Info@Imhotheb.de>

Licence.md

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+# Allgemein / Common:
+
+### Lizenz
+Diese DLL-Datei ist kostenlos und darf sowohl privat als auch kommerziell verwendet werden.
+Folgende Copyright-Texte müssen mitgeliefert werden:
+Copyright © 2019 RSBasic.de
+
+### Licence
+This DLL file is free of charge and may be used both privately and commercially.
+The following copyright texts must be provided:
+Copyright © 2019 RSBasic.de
+
+---
+
+## PB.Ex PDF
+Copyright (c) 2005-2014 empira Software GmbH, Troisdorf (Germany)
+
+## PB.Ex Mail
+Copyright (c) 2012-2014 Torben Könke
+MimeKit is Copyright (C) 2012-2018 Xamarin Inc.
+
+## PB.Ex Webgadget
+Copyright © The CefSharp Authors. All rights reserved.
+Copyright 2015 The Chromium Authors. All rights reserved.
+
+## PB.Ex FTP
+Copyright (c) 2015 Robin Rodricks and FluentFTP Contributors
+
+## PB.Ex Math
+Copyright © 2019 RSBasic.de
+
+The DLL files are free of charge and may be used both privately and commercially.
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+They use the "Hef.Math.Interpreter":
+https://github.com/fsegaud/Hef.Math.Interpreter
+Copyright © 2017 François Ségaud
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+