Create README.md

Author: vors

README.md

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+# DscResource.Tests
+Common meta tests for PowerShell DSC resources repositories.
+
+## Goals
+
+1. Consistency in encoding and indentations. 
+Consistency is good by itself. But more importent it allow us to:
+2. Avoid big diffs with cosmetic changes in Pull Requests. 
+Cosmetic changes (like formatting) make reviews harder.
+If you want to include formatting changes (like replacing `"` by `'`), 
+please make it a **separate commit**. 
+Reviewers would have an option to review meanful changes separately from formatting.
+
+## Fixers
+
+We are trying to provide automatic fixers, where it's appropriate. 
+A fixer corresponds to a particular test.
+
+For example, if `Files encoding` test from [Meta.Tests.ps1](Meta.Tests.ps1) test fails, 
+you should be able to run `ConvertTo-UTF8` fixer from [MetaFixers.psm1](MetaFixers.psm1).