Consolidated code for drawing x-axis label

[wimrijnders]

The drawing of the axis labels occurs in two places and are chunks of non-trivial code. Hence I think it is a good idea to consolidate these.

This PR contains a new single method for drawing labels for the x-axis. If you can agree with this, I will do the y and z axis labels in a similar manner. Awaiting your response.

[yotamberk]

I like it! Keeping things DRY!
I'd like @mojoaxel just to take a look at it again just to make sure he's fine with it too.

[wimrijnders]

OK, fine with me.
If you're both good with it, perhaps I can add the Y and Z label handling to this PR as well.

[yotamberk]

That sounds good to me

[mojoaxel]

@wimrijnders Looks good. Feel free to add more changes concerning the axis labels.

[wimrijnders]

Ok. I'm missing my upward thumb emoticon here - (y) in skype.

Will do it this afternoon, have some other tasks now.

[wimrijnders]

Oh, merged already. Never mind, I'll make a new PR for the Y and Z labels.

[mojoaxel]

Ok. I'm missing my upward thumb emoticon here - (y) in skype.

start with a ":"

http://www.webpagefx.com/tools/emoji-cheat-sheet/

[wimrijnders]

👍 Ha! Thank you. Very important, this.