Change and fix Uncompress support. Old value of "true" is converted to "always"

possible values:
* "always" - try to uncompress, if can't detect archive type, or error uncompressing, fail
* "archive" - try to uncompress if it's an archive, otherwise, just copy
* "never" - default, just copy the files to the destination path

also changed the signalPayloadFailed to pass the entry pointer, used in my local ui changes to report failures when installing