Changed 'publish' to 'sf-publish' to only publish the zips, not all logs. Changed behaviour so that 'sf.spec.package.src.enable'=false stops the source repos from getting packaged, but not the RnD ones (which are extracted again in platform builds)

source syncing ftl - Added 'sf.spec.sourcesync.archive' preference to do 'hg archive' instead of 'hg sync'. If set and the repo sync is s'posed to be synced by tag it still does the slower clone+update behaviour.