Add support for 'no_match_size' to HighlightFieldDescriptor

[yreynhout]

No description provided.

[yreynhout]

From the docs: http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/search-request-highlighting.html#_highlighted_fragments

I have no idea how you're dealing with versioning vis-à-vis the elastic search api, so this may be inappropriate.

[Mpdreamz]

I do not follow a versioning scheme that strictly pairs up with elasticsearch version numbers, since the assemblies are signed I try to be semver compliant.

Thanks for the PR @yreynhout mind signing the Elasticsearch CLA:

http://www.elasticsearch.org/contributor-agreement/

So that I may pull your bits in?

[yreynhout]

I just signed it. Check with Legal that it happened. [Edit]I'm not inclined to put contracts I signed on a public GH repository. Hope you understand[/Edit]