Add Hindi to started translations of Progit
sfc: split donation types with headers

Commit da3dfc0 (drop Google Checkout link from SFC donation
page, 2013-11-01) reformatted the list donation options into
a list. It probably should have split "Wire" into its
category. Later, a5866e6 (sfc: mention that we can take
stock donations, 2013-12-06) made this even worse as we
added a new type that should get its own heading.

This patch adds in separate headings for "Check", "Wire",
and "Stock".
Merge pull request #387 from git/sfc-format-fixes

sfc: split donation types with headers
Merge pull request #386 from jnavila/update_language_list

Add Hindi to started translations of Progit
Update Git Cheat Sheet to new resource
Merge pull request #389 from jordanmccullough/cheat-sheet-resource

Update Git Cheat Sheet PDF to new resource