Update the `README` file

Update the indications in the README file to somehow help
new user get Aevol compiled and started. This is certainly
not a full guide, but hopefully a collection of clues.

README

@@ -30,28 +30,35 @@ distributions. Please visit www.aevol.fr
 
 To take a quick tour, please take the following steps:
 
-1) install aevol
-  cd into the main dir
-  ./configure
+1) Compile Aevol with the following commands:
+  cd aevol/build
+  cmake .
   make
-  sudo make install
 
-  (see INSTALL in the main dir or run ./configure --help for more information)
+In that process, you'll need development packages.
+Here are the basic dependencies on a Debian system:
+  build-essential
+  cmake
+  zlib1g-dev
+  libboost-dev
+  libx11-dev
+  libboost-filesystem1.67-dev
+One option to install them all at once is to run the following command:
+sudo apt install build-essential cmake zlib1g-dev libboost-dev libx11-dev libboost-filesystem1.67-dev
 
-  NOTE: If you don't have sudo rights or simply don't want to install aevol
-  just yet, skip the "sudo make install" step and run the executables "locally"
-  with ../../src/aevol_create and ../../src/aevol_run
+2) To run an example, e.g. basic, assuming you're in Aevol's root directory:
+  cd examples/basic
+  ../../build/bin/aevol_create
+  ../../build/bin/aevol_run
 
-
-2) To run an example, cd into it then run:
-   aevol_create
-   aevol_run
-   
 The first command will create an experiment with the parameters contained
 in the "param.in" file
 The second command will launch the simulation for 1000 generations
-(use --nbgener XXX or -n XXX to run for XXX generations)
+(otherwise, use the --nb_timesteps option to specify the desired number of
+generations)
 
-For more information, please see the manpages (e.g. man aevol_create), run any
-executable with the -h option (e.g. aevol_create -h) and ultimately visit 
-www.aevol.fr
+For more information, please see the manpages in the `doc` directory
+(e.g. man -l aevol_create.1),
+or run any executable with the --help option
+(e.g. aevol_create --help),
+and ultimately visit www.aevol.fr