x86 is the new path for setup.ini

##### Code changes
* Bumped the version number - svn is on 0.57, your git version ~ 0.58, this version 0.59
* Updated the code to find the setup.ini file(s), the are now located under:
  * x86/setup.ini
  * x86_64/setup.ini
* Added a command line switch for x64
* Added ```xz``` to decompress cygwinports packages:
  * http://mirrors.kernel.org/sources.redhat.com/cygwinports/x86/setup.ini
* Changed the "==" to "=" in bash tests (to be consistent)