Merge pull request PowerShell#275 from PowerShell/release/0.7.2 Release 0.7.2

Merge pull request PowerShell#258 from PowerShell/release/0.7.1 Release 0.7.1

Merge pull request PowerShell#172 from PowerShell/release/0.6.0 Prepare 0.6.0 release

Merge pull request PowerShell#114 from PowerShell/release/0.5.0 Release 0.5.0

Merge pull request PowerShell#100 from PowerShell/release/0.4.1 Prepare version 0.4.1

Merge pull request PowerShell#93 from PowerShell/release/0.4.0 Release 0.4.0

Update CHANGELOG.md 

Initial release (Nov 18 2015)