JBIDE-17254: Luna M7
Target Platform 4.40.0.Beta2 release
Target Platform 4.40.0.Beta3-SNAPSHOT
JBIDE-16757 move m2e.jdt to Central (was in JBDS TP); also reorder entries to be in alpha order (m2e-apt before m2e-wro4j)
JBIDE-16757 add new m2e.jdt connectors to JBT and JBDS Central discovery plugin
fix README - use Luna M7
JBIDE-17319 use tools.jboss.org, not jboss.org/tools in Central Discovery overview URLs