add 10 to yLabelWidth on set, rather than on use

[rylanhalteman]

Padding on the line chart's y-axis labels can get crowded because when checking the x-axis label rotation (line 1506) it checks for this.yLabelWidth + 8 rather than this.yLabelWidth + 10.
Ex:

Changing this check to yLabelWidth + 10 fixes this issue. However, since the yLabelWidth variable is either used to only check against itself (in the fit() method, lines 1462 & 1468), or checking against yLabelWidth + 10 (line 1487 * 2, line 1506), I moved the addition to the setting of yLabelWidth, rather than when checking the variable.

Result:

The result is correctly padded y-axis labels.

[pfirpfel]

Would solve #729 and #440

[ccsmail]

Any chance this could be merged? Would be really helpful.

[boroth]

+1

[jakesylvestre]

@rylanhalteman Can you please repoint this PR to the dev branch? Thanks. If your not sure how to repoint this PR please see: http://stackoverflow.com/questions/24159036/how-to-modify-a-pull-request-on-github-to-change-target-branch-to-merge-into

[fulldecent]

I am +1 on this. Any other votes?

[etimberg]

Looks good to me. I am +1 as well.

[wildchild]

Thanks for fix and merging.

[rylanhalteman]

@jakesyl @fulldecent @etimberg My apologies for being unresponsive. I finished my project and was filtering out github emails by mistake. :( Thanks for the merge!