thumbnailer shoudl take a png, not a PDF
Merge pull request #18 from lob/restructure-thumbnail

thumbnailer shoudl take a png, not a PDF
added getStream and updated getMetaData to take stream or buffer
stream support for merge
stream support for rotate pdf
convert burst ot use stream
ripped out thumbnails, not working correctly and not needed, will add back later
stream support for image to pdf
added error handler if problem with read stream
Merge pull request #19 from lob/streams-update

Streams update
0.4.0
0.5.0
Update README.md
0.5.1
Update readme with examples