Update README.md

[skip ci]
Move import benchmark to ImportPageCopyBenchmarkTest
Merge pull request #514 from SemanticMediaWiki/benchmark

Move import benchmark to ImportPageCopyBenchmarkTest
Benchmark tests, calculate standard deviation

- Add PageEditBenchmarkTest to test for #set, [[::]], and #subobject edits
- Split QueryEngine test into standard and extended
- Calculation of key values is moved to the class Benchmarker
Merge pull request #521 from SemanticMediaWiki/benchmark

Benchmark tests, calculate standard deviation
Update RELEASE-NOTES.md

[skip ci]
Update RELEASE-NOTES.md

[skip ci]
Fix 519
Merge pull request #523 from SemanticMediaWiki/factbox

Fix #519
Update RELEASE-NOTES.md

[skip ci]
Add accessible fixtures to enable reuse among tests
Merge pull request #524 from SemanticMediaWiki/fixtures

Add accessible fixtures to enable reuse among tests
Move XmlRawResult fixture
Merge pull request #525 from SemanticMediaWiki/fixtures

Move XmlRawResult fixture
Move test validators
Merge pull request #526 from SemanticMediaWiki/validators

Move test validators
Add Paris fixture and population density record property
Merge pull request #527 from SemanticMediaWiki/fixture

Add Paris fixture and population density record property
Merge branch 'master' of ssh://wmfgerrit/mediawiki/extensions/SemanticMediaWiki