added source map generation so that styling can be debugged easily.
Fixes #4701
Merge pull request #4695 from damiandennis/sourceMaps

added source map generation so that styling can be debugged easily.
Fixing typo in guide-structure-modules
Merge pull request #4703 from PatchRanger/patch-1

[ci skip] Fixing typo in guide-structure-modules
created a test case to verify #4682
fixed cubrid tests
typo fix
Merge branch 'master' of git://github.com/yiisoft/yii2 into dynamic-model-typo-fix
Merge pull request #4705 from disem/dynamic-model-typo-fix

Dynamic model typo fix
Fixes #4708
Fixes #4697: MSSQL query builder does not work for newer MSSQL versions when LIMIT is used without ORDER BY
Merge pull request #4699 from bevalorous/docs-guide-russian-translation

Translated rest-rate-limiting.md and rest-error-handling into Russian [skip ci]
Fix for #4372
Doc update [skip ci]
Changelog update [skip ci]
Merge with master
Update .gitignore
Update .gitignore
Fixes #4636: Added `yii\web\Response::setDownloadHeaders()`