Merge pull request #44 from Winston-Chan/nathan

Renamed things
Fixed minor bug in test cases

I put up old versions originally
isValidTuple is useful
Merge branch 'master' of https://github.com/Winston-Chan/CPSC449
isValidTuple checks
Merge pull request #45 from Winston-Chan/nathan

Fixed bug in splitOn
Necessary change
not (isValidTuple) interspersed in all functions
character functions return upper-case characters.