some readme changes

doc/README

@@ -1,8 +1,26 @@
 # Requirements
 - LLVM 3.2
-- A recent C++ compiler
+- A recent C and C++ compiler
 - CMake 2.6 or newer
 
 # Used Libraries
 - lemon parser (from sqlite) (grammar/*.c)
 - lexertl (http://www.benhanson.net/lexertl.html) (inc/lexertl/*)
+
+# How to build
+
+  mkdir build
+  cd build
+  cmake ..
+  make
+
+# How to run the interpreter
+simply run
+
+  ./scully
+
+and type in your program, you can use
+
+  rlwrap ./scully
+
+for more input awesomeness. (http://utopia.knoware.nl/~hlub/rlwrap/#rlwrap)