Added few more words

git-svn-id: https://svn.pjsip.org/repos/pjproject/trunk@285 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/README.txt b/README.txt
index d9c9d91..646021e 100644
--- a/README.txt
+++ b/README.txt
@@ -3,3 +3,9 @@
 copyright holder.
 
 See INSTALL.txt for compiling.
+
+IMPORTANT:
+You need to set your editor settings to tab=8 and indent=4. For example,
+with vim, you can do this with:
+ :se ts=8
+ :se sts=4