Update README.md

doc/README.md

@@ -1,6 +1,7 @@
 # DOCUMENTATION
 
 Here is a documentation aiming at providing detailed information about Packetgraph's brick concept, about implemented technologies/features (with standards descriptions) and about each brick. The idea is to explain what's the purpose of each component, further optimizations and choices made.<br>
+All this documentation must be written in ASCII so we can access it through a terminal.<br>
 <br>
 An overview of the general concept of packetgraph:
 * [General concept.](PG_GENERAL_CONCEPT.md)