Upload 0.4.0.0 to hackage

[robstewart57]

Hi,

Could the current HEAD of CV, which is at version 0.4.0.0, be uploaded to hackage please?

[gatlin]

I would be happy to upload this and maintain the package.

[robstewart57]

@gatlin @aleator Any thoughts on uploading HEAD as 0.4.0.0 to hackage?