fixes & enhandcements

(benchmark code..) implemented
repl completion very first version
(string xx) added
some builtin renames
a bit of comments
a bit of cocumentation
(sleep interval) added

Readme.md

@@ -1,27 +1,20 @@
 
 ### BUGS
--  (read-file "nonexisting/file.csv") shows only "could not open file"
+-  (read-file "nonexisting/file.csv") shows only "could not open file" - should print filename
 
 ### TODO
-- support for (), nil, t, in lsp code replace 0 by nil in logicals
-- casting to string (like ti int and to float)
-- some performance functionality (at least counting how many times symbol was evaluated)
 - documentation
 - 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 debug support function call could keep call stack
 - 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 or lib function sleep
 - add built in for and, or
-- add debug support
+- add some mem stats to benchmark
+- support for (), nil, t, in lsp code replace 0 by nil in logicals
 - file functions
   - name it here
 - string functions
@@ -35,17 +28,17 @@
 - env functions 
   - get env
   - set env
-- add hash datatype
-- conversion functions like parse-integer
-- in test.lisp some explaining prints
 - format (sprintf)
 - setq
 - mapcar (funcall, apply)
 - syntax highlighting do VS Code
+- add hash datatype
 
 #### Performance
 - push_back - repeatedly without reserving size
+- range - with for(int i...) and reserving result size can be 3times faster on (range 1 10000)
 - mini_sprintf - unnecesary copying between vector and list
+- (do ..) repeatedly assign to acc, maybe somewhere else
 
 #### Install
 ```
@@ -55,7 +48,7 @@ cp stdlib/*.lsp /usr/local/var/mlisp/
 
 #### Compile
 ```
-gcc -o ml -I/usr/local/opt/openssl/include -Iclib -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp clib/printf.cpp clib/linenoise.c
+gcc -o ml -I/usr/local/opt/openssl/include -Iclib -L/usr/local/lib -L/usr/local/opt/openssl/lib -lm -lstdc++ -lcrypto -lssl -Wl,-stack_size -Wl,0x1000000 --std=c++17  ml.cpp ml_io.cpp ml_date.cpp ml_string.cpp ml_util.cpp clib/json11.cpp clib/csvparser.cpp clib/sslclient.cpp clib/printf.cpp clib/linenoise.c
 ```
 or
 cmake