Namespace flood to heka-flood

- Update documentation and build references
Inject build fix
Namespace sbmgr to heka-sbmgr

- Update documentation and build references
Namespace sbmgrload to heka-sbmgrload

- Update documentation and build references
Update Build References
Revert config file names
Update changes.txt
Merge pull request #609 from christianvozar/namespacing

Namespace Heka Utility Applications