use absolute path for artifact repo, to avoid path resolution issues of
the zip wrapper on relative path' under windows
fix inconsistent usage of DIRECTORY_SEPARATOR causing errors on windows
Merge pull request #11 from backbone87/fix/zip-rel-path

use absolute path for artifact repo, to avoid path resolution issues of
Merge pull request #12 from backbone87/master

fix typo
Merge pull request #13 from backbone87/fix/win-path2

fix inconsistent usage of DIRECTORY_SEPARATOR causing errors on windows