Changes the output from '0100' to '1000' and fixes the parsing of `CLTVersion()` output too in case `xcodebuild -version` prints an unexpected output.

* Use __print()__ function in both Python 2 and Python 3
    * __print()__ is a function in Python 3.
* Old style exceptions --> new style for Python 3
    * Python 3 treats old style exceptions as syntax errors but new style exceptions work as expected in both Python 2 and Python 3.