Update patches for Solr 4.7.0

Update the Solr patches to apply cleanly to Solr 4.7.0.
Upgrade to the 4.7.0-yz1 Solr package

Upgrade to the Solr 4.7.0-yz1 release. This is a custom release based
on upstream Solr 4.7.0 with the local solr-patches applied.
Upgrade to the Lucene 4.7 codecs

Upgrade the solrconfig.xml to use the latest Lucene codecs.
Add Kurdish language support

Add a Kurdish analyzer/field-type to the default schema.
Pull stopwords from package example

As upstream Solr is updated the maintainers may change the contents of
the example stopword files for the various languages supported. Rather
than tracking these in Yokozuna's source tree it makes more sense to
copy them from the Solr package. This way they are kept up to date in
sync with Solr.
Remove unused file

This is an old stopwords file that is not referenced by the default
schema anymore. All stopword files now live in the lang/ subdir.
Pull various files from Solr example

Copy these files from the Solr package so that they remain in sync
with upstream Solr.
Merge pull request #344 from basho/rz/upgrade-solr-4.7

Upgrade to Solr 4.7.0