Vesion bump
Version update
Small fix and example for Attachments
Ensure no trailing slash before slash is added.
Merge branch 'coop182-master'
Version bump
try content-name if disposition-filename isn't set

I've encountered attachments where content-name is set instead of disposition-filename, the header for the part looks like: 
```
Content-Type: application/octet-stream; name="filename.csv"
Content-Transfer-Encoding: base64
Content-Disposition: attachment
```
Merging Chris patch: try content-name if disposition-filename isn't set #6
Version bump