fixed IronPython source with mixed line endings, changed to LF
Merge pull request #1140 from paweljasinski/crlf2lf

fixed IronPython source with mixed line endings, changed to LF
implemented nt.fsync
updated nt_test to use nt.dup
updated test in modules/system_related to match 2.7.5

- thread.interrupt_main is defined
- time.strptime has problems with day of week
- sys.getrefcount is defined
- sys.version - updated regex to match current version schema
- sys.ps1 and sys.ps2 - still defined in non-interactive mode