A temporary fix for the PKG permission issue by using chmod -R 755 in the postinstall
script. Change the install location to remove the "cli" part of the path. Also
change the corehost to reflect this change.
Fixes#492 and #390
Add proper symlinks to the postinstall script. Also, the permissions of the
resulting directory post-install were wrong (set to root:wheel). This is fixed
by using the --ownership preserve switch to pkgbuild.
Fix#247
