Added non-support for kyoto cabinet

Author: mielvds

README.md

@@ -69,6 +69,14 @@ Sometimes, the above instructions do not result in a working HDT
 installation.  This section enumerates common issues and their
 workaround.
 
+#### Compilation issues using Kyoto Cabinet
+
+The support for Kyoto Cabinet was never finished and is currently suspended. It is for the time being not possible to compile HDT with KyotoCabinet.
+
+Common error: 
+  
+    error: conflicting return type specified for ‘virtual unsigned int hdt::KyotoDictionary::getMapping()’
+
 #### Package requirements (serd-0 >= 0.28.0) were not met
 When getting