Add Haskell bear project

[jayvdb]

A project to take https://github.com/coala/coalaHS and make it a viable way to write new bears.

See coala/coala#3416 (comment)

[wisn]

Let's wait till GSoC announcement first. I would like to think about the project design so everyone could write new bears. I hope there will be a lot of Language modules available after this.

[maweki]

A little problem is that the json-exchange format does not allow for patch suggestions while the native ones do.

[wisn]

I see. That's mean I need to do some research.

[bharatpurohit97]

this issue is still open?