Update README.md

README.md

-
 [![logo](logo_blaar.png)](http://blaar.org)
 
 Basic Libraries And Applications for Robotics
@@ -36,8 +35,8 @@ Basic applications
 - [f_schunk_hand](https://framagit.org/blaar/f_schunk_hand/wikis/home)
 -->
 
-Standard install BLAAR
-======================
+Install
+=======
 
 Mac OSX
 ------------
@@ -47,21 +46,37 @@ Mac OSX
 You need Xcode or a C/C++ compilation (clang, g++, ..). 
 
 Copy past this line in a terminal
-```sh
-curl -sS https://framagit.org/blaar/blaar/raw/master/developer_tools/standard_osx_blaar_install.sh | sh
-```
+
+    curl -sS https://framagit.org/blaar/blaar/raw/master/developer_tools/standard_osx_blaar_install.sh | sh
 
 You can do [**step by step**](https://framagit.org/blaar/blaar/blob/master/developer_tools/standard_osx_blaar_install.sh) copying command line by command line. This may be useful to better understand and in case where the installer crash.
 
 If you have a problem at compile time it may be due to a bad configuration of your compiler  [**see how to install command line tools mac os x**](http://osxdaily.com/2014/02/12/install-command-line-tools-mac-os-x/)
 
+
+###Optional modules
+
+    #f_gnuplot to draw values of blc_channels
+    brew install gnuplot --with-qt
+    git submodule update --init 
+
+    #f_view_channel to have a gtk interface to view blc_channels (need gtk3, blgtk basic library for gtk3,  will be installed)
+    brew install gtk+3 gnome-icon-theme
+    git submodule add https://framagit.org/blaar/blgtk.git
+    git submodule add https://framagit.org/blaar/f_view_channel.git
+    ./install blgtk
+
+    #blQTKit allow program to use the camera
+    git submodule add https://framagit.org/blaar/blQTKit.git
+    ./install blQTKit
+
 Ubuntu
 ------
 
 Copy past this line in a terminal
-```sh
- wget -q  -O/tmp/blaar_install.sh  https://framagit.org/blaar/blaar/raw/master/developer_tools/standard_ubuntu_install.sh && sh /tmp/blaar_install.sh; rm /tmp/blaar_install.sh
-```
+
+    wget -q  -O/tmp/blaar_install.sh  https://framagit.org/blaar/blaar/raw/master/developer_tools/standard_ubuntu_install.sh && sh /tmp/blaar_install.sh; rm /tmp/blaar_install.sh
+    
 
 You will be requested at some point to enter your admin password to make the installation.