fixes delete folder on XP
- added implementation for ShowSaveDialog on Linux
fix whitespace
Merge pull request #314 from adobe/irichter/showSaveDialogLinux

- added implementation for ShowSaveDialog on Linux
Merge pull request #313 from adobe/jeff/fix-delete-folder-win-xp-rb

Fixes delete folder on XP
Merge branch 'master' into jeff/linux-stubbed-fs-api-impl