JBTIS-340 - update to JBTIS target platform 4.2.0.Beta1b
Replace TP symlinks by composite*.xml

JBTIS-340 - update to JBTIS target platform 4.2.0.Beta1b

remove old Beta TP pointers; no longer needed

update updates/staging to point to latest released milestone & TP

release 4.41.0.Final target platform to /luna/ pointer
add READMEs to encourage people to use the static URLs for released target platforms
release jbtcentral and jbtearlyaccess TPs and link to theem from /luna/ folders
remove old disco plugins; add new ones for Final; update index, directory.xml and earlyaccess.properties
release JBT42 to /stable/
update index pages
release 4.2.0.Final to ide-config.properties
add JBT TP to EA site so that stuff like tern-feature and tern-server-nodejs-feature can be resolved (hopefully)
move JBT TP and JBT Central TP out of EA site; add JBT TP to JBT main site so even Tern can be resolved from EA
s/joss/jboss
comment out all the stuff we don't need right now for nightlies and staging; only need stable release and dev milestone (which contain the same content)