Created base main file.
Created formula validator class base.
Added whitespace checking.
Added multiple line checking.
Added checking for spaces.
Added checking for potential formula.
Setup layout for syntax checking.
Added syntax checking w regex.
Added parentheses checking.
Working on parentheses multiplier.
Finished up parentheses checks.
Commented out parentheses code.
Wrote chem formula checker tests.
Added nonzero exit code for IOException.
Wrote error-handling doc and added assertions.
Got parentheses matching working.
Working on grouping multiplier checking.
Grouping with parens works and is tested.
Modified regex for multiplier.
Organized code.