I updated the regex used in split-line to account for and discard
comments.
I also updated it to account for multiple = signs, such as in
environment variable definitions.
I added a documentation readme.
I added a license (GPLv3)
SPLIT-LINE now deletes SETTING from the hash-table if it is passed "SETTING=nil".
READ-SYSTEM now explicitly uses string= to identify sections in the
associative list.