Add README.md

README.md

+requires base packages build-essential git gcc-9 g++-9 
+and cmake gfortran for compiling the thirdparties
+
+requires Clp, Lemon:
+
+from package manager :
+    sudo apt install libeigen3-dev
+    sudo apt install coinor-libclp-dev coinor-libcbc-dev
+    sudo apt install liblemon-dev
+    
+I recommend getting librairies from sources for lattest versions : 
+
+Clp : using coinbrew :
+    mkdir coinor
+    cd coinor
+    git clone https://github.com/coin-or/coinbrew
+    export OPT_CXXFLAGS="-pipe -flto -O3 -march=native"
+    export OPT_CFLAGS="-pipe -flto -O3 -march=native"
+    export LDFLAGS="-pipe -flto"
+    ./coinbrew/coinbrew build Clp:releases/1.17.5
+    add 'export LD_LIBRARY_PATH=/home/plaiseek/Libs/coinor/dist/lib' to your ~/.bashrc
+        
+Lemon : http://lemon.cs.elte.hu/trac/lemon/wiki/Downloads
+    cd lemon-x.y.z
+    mkdir build
+    cd build
+    cmake ..
+    make
+    sudo make install
+
+Then specify the paths in the makefile
\ No newline at end of file