Update README.md with descriptive language

Updated vimb's README.md with more descriptive language regarding changing files ```config.mk``` and ```config.h```.

diff --git a/README.md b/README.md
index 7941316..369a18a 100644 (file)
--- a/README.md
+++ b/README.md
@@ -42,9 +42,12 @@ the project page of [Vimb][].
 
 ## Install
 
-Edit `config.mk` to match your local setup.
+Edit `config.mk` to match your local setup. You might need to do this if 
+you use another compiler, like tcc. Most people, however, will almost never 
+need to do this on systems like Ubuntu or Debian.
 
-Edit `src/config.h` to match your personal preferences.
+Edit `src/config.h` to match your personal preferences, like changing the
+characters used in the loading bar, or the font.
 
 The default `Makefile` will not overwrite your customised `config.h` with the
 contents of `config.def.h`, even if it was updated in the latest git pull.