Fix a regression in the README file that don't output the logo (the p…

…ath was no updated). Also add a 'Known bugs' section.

README.md

@@ -1,4 +1,4 @@
-<p align="center"><img src=res/images/png/pokeMail_128.png></p>  
+<p align="center"><img src=res/images/png/pokem_128.png></p>  
 
 # Pokém - Pokémon Mystery Dungeon Mail Generator
 
@@ -48,6 +48,11 @@ will build an application named `app` by compiling the source files passed.
 
 -----------------------------------------------------------------------------------------------------------------------------------
 
+## Known bugs
+* Currently, the Makefile is only fully supported on Linux. On Windows, you will be able to build the application, but you must manually erase all leftovers prior to rebuild, since `clean` is not available, as it fails due to the Windows's paths conventions.
+
+-----------------------------------------------------------------------------------------------------------------------------------
+
 ## License
 This program is under the *General Public License* (version 2).