Revert "add marketplace URLs for JBT 42B1 and JBDS 80B1"

This reverts commit 180a75f50f964b5f41cec80be2129fc7824c2647.
Revert "add JBDS 8.0.0.Beta1, JBT 4.2.0.Beta1, and fix links for JBT 4.2.0.Alpha1/Alpha2. Because half of them were 404'd and the wrong file sizes"

This reverts commit 0da6d2179cc04ba2290cccefc63cbdc81891e55f.
blog about luna nightly and add blog template