Back Unity Support 1.2.0

Notes

• Suppress naming consistency checks on message handlers
• Add parameters to generated message handlers (#8)
• Automatically sets Unity projects to C# 5. No more incompatible C# 6 suggestions! (#5)
• ReSharper no longer suggests `Assets` or `Scripts` as part of the namespace of your code (#6)

From previous releases:
• Generate message handlers with parameters (#10)
• Suppress naming consistency checks on message handlers (#11)