Adds linting messages on line hover to anaconda. Resolves #862

[Kyu]

* Added on_hover listener to show a popup if a line contains a linting messages
* Added "anaconda_linter_hover_message" to Anaconda.sublime-settings. Defaults to false.

Hi, this is my pull request for #862 . I know the contributing guide says to wait for the issue to be discussed, but I'm kinda impatient and I wanted this enhancement to be out there for others who want the feature.

Since this is a GUI feature, I didn't add any tests. Tell me if this should be fixed. This is the first Sublime plugin I'm working on, and I added some comments(questions) in the code, any assistance would be appreciated.

Fixes #862

[Kyu]

😃

The message "undefined name 'five'" is missing, it removes messages if there are more than 3. Not sure why. Otherwise it works fine :/

[scuml]

Resolves #862

(Adding comment here so it is recognized bygithub)

[DamnWidget]

Looks good to me, anyone has any reason for this to not get merged?

[scuml]

I'm for merging. Looks good.

[Kyu]

There’s a truncation issue, as I said in the other comment, also there a significan typo in show_popup I didn’t change so I’ll fix that when I get home.

[DamnWidget]

There’s a truncation issue, as I said in the other comment, also there a significan typo in show_popup I didn’t change so I’ll fix that when I get home.

I could not find anything wrong in your code that would point to the reason, I would say ship-it it is better than nothing, we could probably document this limitation

[Kyu]

I randomly came across this. I don't use sublime much anymore, was this feature added in a separate commit? I can update the code if needed.

[AlphonseVA]

Any plans to merge this PR soon?