update Readme.org

Readme.org

@@ -1,17 +1,15 @@
 * The Sex language
-Sex is a S-expressions language, which transpiles to C.
-
-Sex is also Chicken, since all source processing and compile-time
-computations are written in Chicken.
-
-And Chicken is [[https://call-cc.org][R5RS Scheme]].
+Sex is a S-expressions language. Sex is written in Chicken, which is a
+[[https://call-cc.org][R5RS Scheme]].
 
 * Compilation
-First, get yourself a Chicken. Second, some Chicken deps.
+First, get yourself a Chicken, then, some Chicken deps. You also will
+need a C compiler.
 
 ** Install Chicken Eggs
-By the way, there's a way to make Chicken install eggs non-globally. Refer to
-the documentation for more info:
+Tip: there's a way to make Chicken install eggs non-globally. You need
+to export ~CHICKEN_INSTALL_REPOSITORY~ and ~CHICKEN_REPOSITORY_PATH~
+environment variables. Refer to the documentation for more info:
 https://wiki.call-cc.org/man/5/Extension%20tools#changing-the-repository-location
 
 ~chicken-install fmt getopt-long brev-separate test tree srfi-1 srfi-13~
@@ -147,5 +145,3 @@ To harness the power of sex-mode, add the following lines to your
   :load-path "/path/to/sex"
   :mode ("\\.sex\\'"))
 #+end_src
-
-** COMING SOON?: Polymorphism