previous string_handling located datetime and timestamp files have been moved
to the datetime handling folder
Update readme file with more information about currently covered areas
list_helpers:
convert to list, any input, output is always a list
compare to lists, check what elements from A are not in B, type safe
string helpers
add is_int, is_float checker
add string to bool converter for true/True/false/False strings
config reader with parsing and checking
The simple config reader is now in the corelibs with the basic content check, convert to list for entries, convert to value for entries, etc
log updates:
Add Log type Enum for better log level checks and convert
Add a get int for requested log level, and return default if not found
Make the validate log level a static function
Add tests for list helpers and new string helpers
