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I have designed a mashup that uses open source software. A substantial part of another open source project was used and the software of that project was made available under the MIT license. There is a clause in the MIT license that states:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
If I would like to use a different license, where do I include the MIT license? Should I open a folder in which to keep all the licenses of the various open source software I used in my mashup? And how do I indicate which license is the main license (the license for my mashup)?