Clean up comments and make sure all lines are no longer than 80 characters to
aid in readability. Add option to not clean out backups in MESAData files by
setting the optional second parameter to false in the constructor. Also by
default, the history cleanup, if performed, will not output the number of lines
removed. This can be undone by setting the third parameter (also optional) to
true.
Remove offending Dir.exist? command that is uncompatible with older versions
of Ruby.