add a version history
default deployment is now to filesystem on cloudfronted developers-origin,
with profile for deploying to artifactory;
docs updated to show same (new) preferred download URLs
fix docs build for the case where we are building docs for the root
brooklyn-dist should be in a directory named for the current version, not hanging off the root
update download links and instructions to reflect dist archive structure,
and be a little bit clearer in general
pom updated to support deployment to sonatype
remove unused sections of pom
reorder profiles in pom (no changes)