Added support for additional HTTP verbs

Support HTTP verbs other than "GET"
Also added support for additional HTTP headers and HTTP Basic
Authentication
use hi.conf instead of a long argument list
Update changelog
Add support for use of send_ncsa in addition to HTTP for sending
commands to nagios; add TLS support for HTTP, add tests.
Merge branch 'dev' into nagios-improvements

Conflicts:
	CHANGES.txt
Added SIGTERM handling (same behavior as SIGINT), as per http://en.wikipedia.org/wiki/Unix_signal
Map syslog Fields[msg] to the message Payload

- Allows the syslog message contents to be processed in a
  multi-decoder configuration.
- Pull in the sandbox changes to allow parsing of an empty msg
  string in the TraditionalFileFormat template.
Merge pull request #691 from mozilla-services/nagios-improvements

Add support for use of send_ncsa in addition to HTTP for sending
Merge branch 'dev' of github.com:mozilla-services/heka into dev
Issue #95 Allow the sandbox manager to control the sandbox usage limits

- The unit tests are just a configuration sanity check since an all up
  unit test is impractical.
- Manual testing was performed to verify the setting are actually enforced
  on running system.
Fix typo
Issue #670 Clean up message initialization

- Severity should not be initialized to 0 (panic). It will now automatically
  default to 7 (debug) when unspecified.
- Leave all optional fields uninitialized so the don't waste space
  in the message if they are never used.

- http_listen_input is still hardcoded to 6 (info) we may want to
  revisit that in the future.
Don't include debug symbols in the binaries when on unix platforms.
Merge pull request #695 from mozilla-services/issue_95

Issue #95 Allow the sandbox manager to control the sandbox usage limits
Merge pull request #696 from mozilla-services/issue_670

Issue #670 Clean up message initialization
Tested on windows.
Issue #665 No sandbox preservation between unload/load

- Restores the intended behavior on not to preserve state between
  unload/load.
- Avoids a race condition by removing the preserved state before
  load instead of during unload.
Merge branch 'dev' into issue_665

Conflicts:
	sandbox/plugins/sandbox_manager_filter.go
Issue #623 Add metrics to the protobuf decoder
Misc cleanup of sandbox docs/examples

- Update the sbmgr test config to work with 0.5
- Remove outdated/unused Lua test samples
- Update the documentation