Merge pull request #14 from banana93/master

Added some test codes for doOperatorStackRewinding()
Added some test codes for doOperatorStackRewinding()
Still modifying Operator files
Modified tokenDisplay
Done tokenDisplay()
Merge branch 'master' of https://github.com/Raydivine/Calculator
Merge pull request #15 from mygamelife/master

Done tokenDisplay()
Added executeOpeningBracket to Operator.c files
Merge pull request #16 from darklord1310/master

Changes in the display buffer function to make it output >>
Merge pull request #17 from banana93/master

Added new function to Operator.c files