Bump to 0.20.5.
Bump to 0.20.6 and remove BuildArch: noarch

Setting the architecture to noarch prevents the %ifarch macro taking affect
which prevents the native sigar extensions from being included and no
OS-level statistics are captured.
Tweak ulimit call in init script to allow unlimited memory locking.
Merge pull request #1 from bodgit/master

Bump to 0.20.6 and fix sigar bindings