Make edits and simplifications after feedback from NF board.
MAINT: fix a couple of typos.
Merge pull request #1 from rgommers/fix-typo

Fix typo in first paragraph.
Remove unnecessary paragraph as per board meeting discussion.

Fix Travis' title.x
Change name of team to 'fiscal team' to clarify its purpose better.

Deleted team description file altogether, which wasn't used anymore;
other minor cleanups.
Update instructions.
Add clarifications about fiscal team to README file.
Tiny cleanups
Minor cleanup
Add wikipedia fiscal sponsorship link