fix markdown formatting in changelog

[jjb]

No description provided.

[necolas]

No thanks.

[jjb]

@necolas in case this wasn't clear, the current document is not markdown syntax at all

http://daringfireball.net/projects/markdown/syntax#header

I've seen === before, can't remember where -- maybe trac wiki or rdoc?

[jjb]

@necolas was there a particular reason why you wanted to keep the === instead of markdown syntax?

[alrra]

@necolas was there a particular reason why you wanted to keep the === instead of markdown syntax?

@jjb see: #239 (comment).

[jjb]

@alrra @necolas

I just don't like Markdown-heading formatted changelogs on GitHub

gotcha -- so in that case maybe rename the file from .md to .txt? :)

[necolas]

I use CHANGELOG.md everywhere at the moment, sometimes I link to issues, so I keep the files as markdown.