Fix a lot of incorrect information

[TylerFisher]

Found a couple typos in the data, a bad header name and a malformed date.

[gigamonkey]

FWIW, the fixed date in the NY primary seems to be correct based on:

http://www.elections.ny.gov/NYSBOE/law/2018PoliticalCalendar.pdf

[TylerFisher]

Hi, so this is no longer fixing a couple typos. I have found numerous errors in the data, based on the secretary of state websites. I only made my way through about half of the states so far, and I wanted to check in and make sure I'm not crazy.

Below are screenshots from where I found the information, almost always directly on the secretary of state's website. If there's a more reliable source of information I should be using, let me know.

Arkansas

Arkansas' voter registration was missing, found it on their election calendar.

Colorado

Colorado's vote by mail application deadline is in fact June 18th.

Early voting runs from June 18th to June 26th. Both of these dates are from the secretary of state's election calendar.

Hawaii

The secretary of state calendar clearly states the open/close dates for early voting and the vote by mail application deadline.

Idaho

The secretary of state calendar notes the last day for application of a mail-in ballot as May 4, not May 9.

Illinois

The secretary of state calendar says that early voting ends on March 19, not March 17.

The same calendar says that vote by mail applications are due March 15, not March 19.

Indiana

Absentee-in-person voting in Indiana begins 28 days before the election. The election is on May 8, so that would mean April 10 is the beginning of absentee-in-person voting. The secretary of state's calendar notes the same date. The data in this repo marks the beginning of early voting as March 6, and closing on April 6.

Kansas

Kansas's secretary of state site (which was missing -- I added to the state reference file) says that the last day to register to vote for the primary is July 17

Maryland

Maryland's election calendar says that early voting begins on June 14, not June 16.

Massachusetts

In Massachusetts, the only information I could find was the general rules about registration, which state that the voter registration deadline is 20 days prior to the election. The election is September 18, so 20 days before that is August 29.

Minnesota

Minnesota's website claims you can request a vote by mail ballot up until the day before the election.

Nebraska

In Nebraska, early voting ballots are available 30 days before the election. That's April 16, not April 10. The 2018 election calendar also notes this date.

Nevada

Nevada has a handy calendar with all the dates we care about. Voter registration in person closes May 22, not May 14. You can request an absentee ballot by mail until June 7, not June 5.

New Hampshire

New Hampshire's calendar notes that voter registration closes on August 29.

The only information I could find about vote by mail in New Hampshire was from the Federal Voting Assistance Program. They claim you can apply for absentee ballots technically until the day before the election.

[fpereyra]

thanks all! per @hodgesmr, we're leaving VR deadlines blank in states where folks can register and vote on election day (we'll make this more explicit in the docs too). big thanks to @TylerFisher for corrections with screenshots!

[TylerFisher]

Thank you for this much needed resource!