Updated glfw instructions

README.md

@@ -22,10 +22,13 @@ cmake ..
 make
 ```
 
-### glfw3 library install
+### glfw3 deb package install
 
-Clone and install the latest version of GLFW to a folder of your choice:
+```
+sudo apt-get install libglfw3-dev
+```
 
+If libglfw3-dev is not available on your system, you can install manually with:
 ```
 git clone https://github.com/glfw/glfw.git
 cd glfw
@@ -35,15 +38,12 @@ cmake -DBUILD_SHARED_LIBS=ON ../
 make
 sudo make install
 ```
+**Note** The `-DBUILD_SHARED_LIBS` is necessary otherwise cmake will create a static library.
 
-**Notes** The `-DBUILD_SHARED_LIBS` is necessary otherwise cmake will create a static library.
-
-Currently, GLFW3 is usually not available with apt-get but if it is available on your system, you can use :
-*sudo apt-get install libglfw3-dev*
 
 ### Execution
 
 The GUI can be run with
 ```
 ./pbdlib_gui
-```
\ No newline at end of file
+```