**Added -Pending:$flags for Linux and OSX to set-content and add-content
tests that expose dynamic variable file issues on these platforms
(https://github.com/PowerShell/PowerShell/issues/891)
**Handled platform-specific line-ending differences in Get-Content
-ReadLine - Tail tests
- Pester source code moved to `test/Pester`, deleted `ext-src`.
- Pester tests (.ps1 files) moved to `test/powershell`
- xUnit tests (.cs files) moved to `test/csharp`
- Third-party script test moved to `test/shebang`