Localisation updates from https://translatewiki.net.

Change-Id: I4699f943b47e8a84df3f073b8813c7d9303c6038
Add test autoloader
Simplify the PLURAL usage in English
Merge pull request #364 from amire80/i18n

Simplify the PLURAL usage in English
Update en.json

Change formatting (see https://github.com/SemanticMediaWiki/SemanticMediaWiki/issues/363)
Merge pull request #365 from SemanticMediaWiki/issue363

Update en.json (see https://github.com/SemanticMediaWiki/SemanticMediaWiki/issues/363)
Localisation updates from https://translatewiki.net.

Change-Id: Ie760c0adee7553837165758bf67d1258e31e497a
Merge branch 'master' of ssh://wmfgerrit/mediawiki/extensions/SemanticMediaWiki
Merge pull request #362 from SemanticMediaWiki/autoloader

Add test autoloader
Update README.md

[skip ci]
Add \SMW\SPARQLStore\TurtleTriplesBuilder

- Move code from SparqlStore to TurtleTriplesBuilder
- Add SimpleQueryLookupWithoutBaseStoreIntegrationTest
- Add SparqlStore::doSparqlDataUpdate to update only the Sparql back-end
- Add TurtleTriplesBuilderTest