fix for yas3fs issue #41

fix for yas3fs issue #41
fix for issue #42

fix for https://github.com/danilop/yas3fs/issues/42
fix for issue #40

fix for https://github.com/danilop/yas3fs/issues/40
fix for issue #43

support for https://github.com/danilop/yas3fs/issues/43
updated options

updated options for #43
Merge pull request #45 from ewah/master

fixes for #41, #42, #40, #43