Added contents from decttest module from David Borncamp, as is, into satdet module.
Added contents from decttest module from David Borncamp, as is, into satdet module.

git-svn-id: ae5d535d8549566df64d2c38e8f7097ffa427e83@45931 fe389314-cf27-0410-b35b-8c050e845b92

jhunkeler/acstools