doc updates

Readme.md

@@ -7,21 +7,21 @@
 - some performance functionality (at least counting how many times symbol was evaluated)
 - download 10 years of data from api.nasdaq.com into test dir
 - documentation
-- rename data.csv and add more tickers
 - add url of source/inspiration to clib/*.cpp
 - add stdtest - to test every functionality 
 - rename ivaluize
 - add benchmark
 - add instrumentation (time, nr of evals, num of atoms, debug info, debug environment etc)
-- in casting functions (as_string..) better exception description
-- add better print (syntax high-lighting)
+- in casting functions (as_string..)
+- better exception description
+- add better print (coloring output)
 - add command line options -h for help, -v for version, -b for no stdlib.lsp on startup
 - add readline like functionality (libnoise)
 - multiline editting (kilo editor)
 - execute system command should capture stderr
-- add builtin sleep
+- add builtin or lib function sleep
 - add built in for and, or
-- add some debug support
+- add debug support
 - file functions
   - name it here
 - string functions
@@ -39,7 +39,6 @@
 - format (printf)
 - setq
 - mapcar (funcall, apply)
-- delete UNIT (replace it by nil)
 
 #### Performance
 - push_back - repeatedly without reserving size