NEXUS-6735: Wait only if parallel build is used
[NEXUS-6780] update httpclient to 4.3.5 (and httpcore to matching 4.3.2)
Merge pull request #69 from sonatype/NEXUS-6735-wait-only-for-parallel-builds

NEXUS-6735: Wait only if parallel build is used
release: 1.6.3
update to next version: 1.6.4-SNAPSHOT
Update README.md
Update README.md
Merge remote-tracking branch 'origin/master' into lightweight-staging