fix a splitAtElement bug with adjacent separators
export Regexp types, disambiguate CsvReader's
fix a regexReplaceCI bug
parsing: aliases now match by regular expression

alias match patterns (the part left of the =) are now case-insensitive
regular expressions matching anywhere in the account name. The
replacement string (the part right of the =) can replace multiple
matches within the account name. The replacement string does not yet
support any of the usual syntax like backreferences.