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
Issue #393 Add support for local external packages
Issue #393 Use the tag parameter as the trigger instead of the VCS

Using a special invalid tag makes mores sense and requires minimal
effort to toggle between local and live externals.
Fix the cbuf header naming in the host aggregrator
Merge pull request #610 from mozilla-services/issue_393

Issue #393 Add support for local external packages
Update Build References
Revert config file names
Update changes.txt
Merge pull request #613 from mozilla-services/cbuf_header

Fix the cbuf header naming in the host aggregrator
Merge pull request #609 from christianvozar/namespacing

Namespace Heka Utility Applications
defer file close to fix issue #604

closing the file too early keeps the profiling from writing out to the file.
Merge pull request #611 from jhawk28/patch-1

remove file close to fix issue #604
Clarify changelog entry.