Add comment to issue specified by title

[epoberezkin]

Optionally create a new issue if the title not found.
At the moment it shows error.

[protoEvangelion]

@epoberezkin I know it has been a while since you created this issue, but can you give me an example of what command you are running?

[epoberezkin]

That's a feature proposal, sorry if it wasn't clear.
The idea is to refer to the issue by title, rather than by ID only
E.g. gh is "my issue" --comment "Node GH rocks!"
If it exists, the comment will be added, if it doesn't - the issue will be created.