Skip geocluster-facet test if the plugin is not installed. Catch the proper exception type in \Elastica\Test\ClientTest.
Fix \Elastica\Test\Index\SettingsTest
Unit test fixes
Add a function to check for the mapper-attachments plugin in IndexTest. Correct _waitForAllocation function name in Index\SettingsTest.
Merge branch 'update-0.90.4' into function-score

Conflicts:
	changes.txt