Zero line dash options

[lndobryden]

• Add border dash options for zero line

• Update Readme with zero line border dash config options

[lndobryden]

This change set exposes a couple more styling options and should help address this issue:
#3821

I'm working on putting a plnkr together to showcase the issue and how this change set fixes it.

[etimberg]

Looks good code wise to me. Would love to see a fiddle of it in action

[simonbrunel]

@lndobryden can you push/force push to your branch to trigger a new Travis build please?

[lndobryden]

Hi,
Here's a quick plunker.
https://plnkr.co/edit/T2rIKlwlD9MkbGcktsYG
I commented out the relevant new options. Let me know how it looks!

[etimberg]

@lndobryden looks good 👍

[lndobryden]

👍 Great!

[etimberg]

@lndobryden we merged a PR that changes the docs over to use GitBook. Is it possible to rebase this against master so that we can merge it?

[lndobryden]

Hi @etimberg,
I think that should do it. Do you think this can get merged soon?

• Lee

[etimberg]

Thanks @lndobryden I will merge this now

[shokry-suleiman]

                          yAxes: [ {
                            
                                gridLines: {
                                   
                                    zeroLineBorderDash:[2,2]
                                    

                                },                  
                            }],
                            xAxes: [{
                                
                                gridLines: {
                                 
                                    zeroLineColor: '#e7e8ee',
                                    zeroLineBorderDash:[5,3]

                                },
                            }],