Bump versions
Merge remote-tracking branch 'origin/master'
Add centos5 support code
Fix some warnings discovered by shellcheck

(and some more portability added by accident)
Add defaults for master_host/port in config
Use sha1 in yum repo, to be compatible with centos5
Remove obsoleted ports.conf
Update README
Change dependency on cleverdb-agent-service to >=
Finally remove ports.conf from spec
Bump versiosn, update changelog