Added note on updated DCGs example. Added release date for new 2.15.4 version.
Added note on updated DCGs example. Added release date for new 2.15.4 version.


git-svn-id: 4c7b768bc2e2a56aa1c56b1b5a9454ba68342430@494 ac9c905b-388a-4ddf-9b6a-4063a022bc57

LogtalkDotOrg/logtalk2,LogtalkDotOrg/logtalk2,LogtalkDotOrg/logtalk2,LogtalkDotOrg/logtalk2,LogtalkDotOrg/logtalk2