Fix border condition bug in BestStatementsFinder
Merge pull request #287 from wmde/BestStatementsFinder

Fix border condition bug in BestStatementsFinder
Update RELEASE-NOTES.md
Add Statement::newFromMainSnak

Split from https://github.com/wmde/WikibaseDataModel/pull/205
Add StatementList::getMainSnaks
Add StatementList::getWithPropertyId
Optimize StatementList construction from array