Cleaning couple of small things
extract cleanupNames function
Revert "unescape extracted file names from nupkg - references #411"

This reverts commit 2eabf1cffa6aa3004f8c11b6392bdaf62bffcf0a.
Revert "decode uri on createRelativePath"

This reverts commit 5a6870a4ac805a2027c0f7c3454528e9cf156809.
Only report prereleases
Bump version to 0.17.6