put {"_id":"test"} when "test" already exists -> conflicts
revisions can pass the checkRevisionFormat function now

before: putAttachment('docid/attmt','rev','data','mimetype',callbacks);
now:    putAttachment({id:'docid/attmt',rev:'rev',data:'data',mimetype:'mimetype'},callbacks);

Original authors: Sven Franck and Tristan Cavelier

Use it like jio_instance.putAttachment({
    _id:'doc/attachmt',
    _data:'base64data',
    _mimetype:'mime/type'
    //_rev:'..'
},[options],[callbacks]);