Add some README

README.md

@@ -4,6 +4,12 @@ This is a minimalistic, (mostly) POSIX complaint terminal text editor,
 which should be working on all common (and not so common) VT100
 compatible terminal emulators.
 
+This started as a little experiment, how far I can go with just a C
+compiler and the linux mapnages, without any libs or other external
+dependencies such as ncurses. This is a working text editor and
+perfectly fine for quickly edit some config files or take some
+notes, but definitive not intended to use as a full blown IDE.
+
 ## Features
 
 * Load/Save/Create text files
@@ -13,9 +19,16 @@ compatible terminal emulators.
 * Super small (23k)
 * No dependencies
 
+## Limitations
+
+* No UTF-8. If you open an UTF-8 file with only characters from the ASCII
+  table (most of Englisch texts and source code), it works just fine
+  (because ASCII and UTF-8 are compatible in the "upper part" of the table),
+  but you will mess up your file when you are edit files with special
+  chars like ö in it.
+
 ## Compile
 
-    $ cd src
     $ make
 
 ## Run