[Website] Fix Contact page Alignments

Alignments of the contact components on the [Contact](https://erpnext.org/contact) page are aligned to the extreme left.

Resolution: 1280x800

![image](https://user-images.githubusercontent.com/33246109/42125897-fcd51ee8-7c9c-11e8-8514-ddc647ebe1a7.png)
