* added toString() method to CWhile.
* Added unify method to each class.
* Removed StringBuilder.
* Added toString method to CDoWhile class.
!Dependent on CDeclare merge.
* Added toString() method to CStruct.
* Added toString() method to CIf class.
Merge remote-tracking branch 'origin/nate-CDoWhile'
Merge remote-tracking branch 'origin/nate-CIf'
Merge remote-tracking branch 'origin/nate-CStruct'
Merge remote-tracking branch 'origin/nate-CType'
Merge remote-tracking branch 'origin/nate-CWhile'