Added attachments section to README.md with details on writing, reading, and removing
Added missing space before syntax headings in the attachments section of the readme
Added section the readme of how to query a view which uses an array its key. The changes include an example of using startkey and endkey to filter the results. Also the group and reduce options for cradle view queries are shown which currently do not appear anywhere in the readme
Merge pull request #210 from nisaacson/master

Attachments documentation