linux smelter -> linux circus tailor

Signed-off-by: Amit Gupta <agupta@pivotallabs.com>
[oO]utputDir -> [oO]utputDropletDir, (cont'd)

[rR]esultDir -> [oO]utputMetadataDir

Signed-off-by: Amit Gupta <agupta@pivotallabs.com>
smelt -> tailor