Another TP2 Release

Although only a few days back a release of tp2 was made available, an update has followed. This improves the format of the "tp2 verify" package verification output ... but the main change is support for two new namespace ACL's:

ALLOW_PREVIEW_INSTALLERS - given a list of names these users are able to perform "tp2 install --preview ..." commands to perform preview installs.

ALLOW_PREVIEW_REMOVERS - specifies a list of users that are able to perform "tp2 remove --preview ..." to perform preview remove commands.

Note that membership of the "ALLOW_INSTALLERS" assumes membership of "ALLOW_PREVIEW_INSTALLERS - the same being true for the remove ACL too.