updated readme with block diagram
Add UMD wrapping to build-prod that exports global Hub object
updated readme with block diagram
Merge pull request #25 from gobengo/umd

Add UMD wrapping to build-prod that exports global Hub object
move jsdoc params to config
fixed build_version tool to check BUILD_EXT env var
LivefyreStream can have Content with attachments written into it and good things happen
added api docs link to README
Merge pull request #26 from gobengo/write_attachments

LivefyreStream can have Content with attachments written into it and goo...
fixed build ext == undefined
Add CDN Instructions to README