add more sophistication to post-install tasks.  Now, tasks can determine whether they are running on install or upgrade, which is extremely useful for post-install scripts
add more sophistication to post-install tasks.  Now, tasks can
determine whether they are running on install or upgrade, which
is extremely useful for post-install scripts


git-svn-id: 4b064e69dc630d28214c1e1442d27300cccf8e9a@178063 c90b9560-bf6c-de11-be94-00142212c4b1

DQNEO/PEAR_Exception