Add xAxis_staggerLabel option implmented similarly to xAxis_rotateLabel

[quetzaluz]

No description provided.

[coveralls]

Coverage increased (+0.04%) to 81.143% when pulling 1f3d00d on quetzaluz:feature/stagger-labels into c9369c9 on areski:develop.

[quetzaluz]

Hello, I work on a very similar python/nvd3 stack and I am interested in contributing functionality that nvd3 supports but is not built out here yet.

I see there is something like a release branch called nvd3-1.8 but builds are failing there. Let me know if this should be issued against nvd3-1.8 anyway.

This library is very clean and nice, thanks for working on it!

[areski]

Thanks for the staggerLabels, much appreciated!

We actually would love to get some help pushing this project forward, nvd3[https://github.com/novus/nvd3] has a lot of features and charts that we don't support yet.
The last version of nvd3 is 1.8.x and the current version here support 1.7, so it will be create to continue the work in make python-nvd3 compatible with the recent nvd3-1.8

[quetzaluz]

Sounds good, I might batch updates for the 1.8 branch into one PR later after working on a few more features for 1.7 . I'll also do my best to be responsive to git comments / emails if needed.