Fix issue in BufferedImageHttpMessageConverter

This change ensures BufferedImageHttpMessageConverter writes when
"*/*" is requested.

Issue: SPR-7763
Add decoding matrix variable values

Issue: SPR-10140
Update mvc chapter on annotations and proxies

Issue: SPR-10132
Add support for HTTP OPTIONS in Spring MVC Test

Issue: SPR-10093
Remove closing tag in form tag's extra hidden fields

The fields returned from a RequestDataValueProcessor are now
written as hidden fields without a closing tag.

Before:
<input type="hidden" name="xxx" value="yyy"></input>

After:
<input type="hidden" name="xxx" value="yyy" />

Issue: SPR-10103
Merge pull request #205 from acogoluegnes/SPR-10093

* tmp:
  Add support for HTTP OPTIONS in Spring MVC Test