Updated doc

documentation/install.md

@@ -6,9 +6,13 @@
 * C++20 compiler such as g++ >= 9.2
 * LibTorch version >= 1.5 cxx11 ABI : [link](https://pytorch.org/get-started/locally/)
 * Boost >= 1.53.0 with program_options : [link](https://www.boost.org/doc/libs/1_73_0/more/getting_started/unix-variants.html)
+* LibTBB 2020 : [link](https://github.com/oneapi-src/oneTBB/releases/tag/v2020.1)
 
 ## Download :
-https://gitlab.lis-lab.fr/franck.dary/macaon
+`$ git clone https://gitlab.lis-lab.fr/franck.dary/macaon.git`\
+`$ cd macaon`\
+`$ git submodule init`\
+`$ git submodule update`\
 
 ## Compilation :
 `$ cd macaon`\