Updated SPEC for statsite version 0.5.0.

+ Updated SPEC to use statsite-{$version}.tar.gz convention for source code
  which can be downloaded using release tags from armon/statsite.  The
  latest tagged release is 0.5.0 as of this commit.
+ Removed daemonize patch source which has been merged into statsite and is no
  longer needed.
+ Updated default configuration with new parameters per statsite readme.