Don't set RegexpParser delimiter unless one is actually specified.
Merge pull request #839 from mozilla-services/tcpinput-regex-parser-delimiter-fix

Don't set RegexpParser delimiter unless one is actually specified.
Fix message pass-through support in SandboxDecoders and add a
suite of decoding tests.
Newline.
Merge branch 'versions/0.5' into sandbox-decoder-passthrough

Conflicts:
	CHANGES.txt
Merge pull request #846 from mozilla-services/sandbox-decoder-passthrough

Fix message pass-through support in SandboxDecoders and add a
Fixes FileOutput panic when using text format and payload == nil.
Use the accessor, duh.
Merge pull request #847 from mozilla-services/fileoutput-null-payload

Fileoutput null payload
Merge branch 'versions/0.5' into dev

Conflicts:
	plugins/file/file_output.go
	plugins/file/file_output_test.go