2.2.0 Support

[marklit]

Elasticsearch 2.2.0 is complaining Knapsack is incompatible.

From /var/log/elasticsearch/elasticsearch.log after starting Elasticsearch:

java.lang.IllegalArgumentException: Plugin [knapsack] is incompatible with Elasticsearch [2.2.0]. Was designed for version [2.1.1]
        at org.elasticsearch.plugins.PluginInfo.readFromProperties(PluginInfo.java:118)
        at org.elasticsearch.plugins.PluginsService.getPluginBundles(PluginsService.java:378)
        at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:128)
        at org.elasticsearch.node.Node.<init>(Node.java:146)
        at org.elasticsearch.node.Node.<init>(Node.java:128)
        at org.elasticsearch.node.NodeBuilder.build(NodeBuilder.java:145)
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:178)
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:285)
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:35)

[jprante]

I have just released a version 2.2.0.0 for ES 2.2.0