Add plotting contest announcement
Update to explain the importance of plots used for real scientific work.

Encourage the submission of source code.
Add information about NumFOCUS cash prizes.
Require source code.
Update the financial aid application deadline date.
Merge pull request #18 from jwiggins/sponsorship-date-typo

Update the financial aid application deadline date.
Merge pull request #14 from mdboom/plotting-contest

Add plotting contest announcement
Added the complete timeline to the file. Simplified the format.
Tweak goals of the file.
Formatting.
Tweak.
Adding the keynote invitation file.
Add program committee invitation.
Merge pull request #20 from thewtex/pc_invitation

Add program committee invitation.
PC invitation tweaks.
Merge branch 'pc_invitation'
Added code of conduct and diversity statement.
added list
updated code of conduct and diversity statement based on @katyhuff's suggestions.
Added Andy's phone number