Simplify README

The term 'virtual terminal emulator' was broken. There is nothing
virtual about it, it's a terminal emulator.

Signed-off-by: Alexander Huemer <alexander.huemer@xx.vu>
Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>

README

@@ -1,6 +1,6 @@
 st - simple terminal
 --------------------
-st is a simple virtual terminal emulator for X which sucks less.
+st is a simple terminal emulator for X which sucks less.
 
 
 Requirements