Include picosha2 in the license header

cmake/templates/license.h.in

@@ -6,9 +6,34 @@ static std::string const otherLicenses{R"(Most of the code is licensed under GPL
 parts are as follows:
 
 libkeccak-tiny:
+  The file libsolutil/Keccak256.cpp incorporates libkeccak-tiny.
+
   A single-file implementation of SHA-3 and SHAKE implemented by David Leon Gil
   License: CC0, attribution kindly requested. Blame taken too, but not liability.
 
+picosha2:
+  The file libsolutil/picosha2.h is imported.
+
+  Copyright (C) 2017 okdshin
+
+  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.
+
 jsoncpp:
   The JsonCpp library's source code, including accompanying documentation,
   tests and demonstration applications, are licensed under the following