Inject CLI Utility

Inject is a light-weight client for the Heka client library allowing
for CLI of injecting arbitary messages into the pipeline.
Tweaked HttpInput docs for clarity and completeness.
Don't override RegexpParser default delimiter unless an alternate is
explicitly specified.
Test default RegexpParser delimiter behavior w/ LogfileInput.
Rename binary to heka-inject, update documentation
Merge pull request #595 from mozilla-services/fix-default-regex-delimiter

Fix default regex delimiter
Represent Fields[ResponseSize] as INT. Includes documentation changes of PR593
Additional metadata for Fields
Remove unused patch files
Merge pull request #601 from mozilla-services/cleanup

Remove unused patch files
Issue #598 Prevent the sandbox externals from being installed in the DEB/RPM packages
Add User-Agent to HttpInput Requests

This will allow easier filtering of the Heka requests for the web
server.
Implement pure go ScribbleDecoder for efficiently setting message
fields to a static value.
Merge branch 'dev' into scribble-decoder
Merge pull request #590 from christianvozar/features/inject

Heka Inject CLI Utility
Merge pull request #599 from christianvozar/fixes/593-ResponseSize

Represent Fields[ResponseSize] as INT. Includes documentation changes of PR 593
Merge pull request #602 from mozilla-services/issue_598

Issue #598 Prevent the sandbox externals from being installed in the DEB...
Merge branch 'dev' into httpinput-doc-tweaks

Conflicts:
	docs/source/configuration.rst
Merge pull request #593 from mozilla-services/httpinput-doc-tweaks

Tweaked HttpInput docs for clarity and completeness.
Issue #603 Improve inject_message error message