Mix labeled/unlabeled at foreman.

Unlabeled tasks are accounted as using an average worker. Resources at
worker/foreman at the master are accounted in place.
Fix allpairs.html tags.
Fix awe.html tags.
Fix chirp_protocol tags.
Fix ftp_lite.html tags.
Fix ftsh.html tags.
Fix install.html tags.
Fix makeflow.html tags.
Fix parrot.html tags.
Fix resource_monitor.html tags.
Fix sand.html tags.
Fix wavefront.html tags.
Fix workqueue.html tags.
Merge pull request #524 from btovar/html_tags

Html tags a'fixin
Switch to find_worker_by_random as the default.
Refactor find_worker_by_random
Fix documentation on url_encode.h
chached name is url encoded
Transmit filename url encoded
Merge pull request #528 from btovar/wq_url_filenames

Wq url filenames