Added a new example, "threads/blackboard", illustrating the use of the threaded_wait/1 and threaded_notify/1 built-in predicates.
Added a new example, "threads/blackboard", illustrating the use of the threaded_wait/1 and threaded_notify/1 built-in predicates.


git-svn-id: 4c7b768bc2e2a56aa1c56b1b5a9454ba68342430@3368 ac9c905b-388a-4ddf-9b6a-4063a022bc57

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