added read and license file for PlastLib

LICENSE

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+ *****************************************************************************
+ *                                                                           *
+ *   PLAST : Parallel Local Alignment Search Tool                            *
+ *   Copyright (c) 2009-2015 Inria                                           *
+ *                                                                           *
+ *   PLAST is free software; you can redistribute it and/or modify it under  *
+ *   the Affero GPL v3 License                                               *
+ *                                                                           *
+ *   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            *
+ *   Affero GPL v3 License for more details.                                 *
+ *****************************************************************************
+

README

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+PLAST - c++ project
+===================
+
+This project contains:
+----------------------
+
+1. C++/11 source code ('src' directory);
+
+2. sample Fasta files to test software ('db' directory);
+
+3. cmake file to compile the project. 
+
+
+Requirements
+------------
+
+1. cmake 2.6 or above;
+2. gcc 4.4+ (Linux), gcc/Mingw64 (Windows) or clang (MacOSX) compiler.
+
+
+Compiling PLAST
+---------------
+
+The PLAST library can be compiled in a terminal with the cmake tool. Once the source 
+archive has been retrieved and unzipped, one just has to do:
+
+    mkdir build
+    cd build
+    cmake ..
+    make
+
+As a result, one should get a dynamic library (in 'build/lib' directory) and a binary 
+(in 'build/bin' directory).
+
+This procedure works both on Linux and MacOs.
+
+For Windows, the Mingw64 environment has first to be deployed since the GCC compiler is 
+needed for compiling PLAST (due to GCC intrinsics use). Then, one has to do:
+
+    mkdir build
+    cd build
+    cmake -G "MSYS Makefiles" ..
+    make
+
+
+Developer documentation
+-----------------------
+
+See https://project.inria.fr/plast/developer-guide/
+
+
+License
+-------
+
+PLAST is free software; you can redistribute it and/or modify it under the Affero GPL v3 
+license. See http://www.gnu.org/licenses/agpl-3.0.en.html
+