change %o and %i references when saving, so they point to the actual index of the expression in the order the expressions appear in the file.
remove useless include
better handling for trailing spaces
fix reference update for multi-statement cells and modified/not-reevaluated cells, disable update for references in strings and comments
config option for reference index update
Merge pull request #243 from benibela/master

change %o and %i references when saving, so they point to the actual index of the expression in the order the expressions appear in the file