Add StarCityGames decksheet display option

[Nightfirecat]

In addition to adding the StarCityGames decksheet format, a number of under-the-covers changes occurred to facilitate generalizing the codebase to allow multiple decksheet layouts. Some of these changes are as follows:

• Decklist parsing (decklist.js) has been fully re-written. All new functions accept parameters (usually optional to resemble previous behavior as much as possible) and utilize return values rather than modifying global variables to allow more predictable behavior, better compatibility between decksheets (individual decksheets can utilize the return value as needed), and improve ease of testing. The primary reason for rewriting parsing was to utilize full card objects (like those stored in the global cards array) in decklist layout rather than simple name-quantity arrays.
• All extraeneous global variables have been removed. The only two that remain are necessary for the validation and PDF update timers to function.
• The page layout has been updated to include a second radio selection above the decklist preview with options for layouts. Additionally, both radio selection lists have had their name attributes updated for ease of selection.
• Both SCG and WotC PDF layout functions have been re-ordered such that copy-pasting text from PDFs displays in a more sane format
• eslint directives have been added to main.js and decklist.js to minimize errors
• Extra js files have been removed
• (incidental) A font sizing bug in the WotC decklist layout has been fixed. (previously if no last name was set, font size was too small)
• (incidental) Centered text is now actually centered in the WotC decklist layout

With all that said, there are some other possible features that have not been included in this PR, such as:

• Section overflow looping. Currently, the SCG decklist caps each section at 15 cards, and does not push overflow into further (or previous) sections.
• Adding handling of a new GET parameter to select decklist. As there was no handling for deck sorting, similarly support was not added for decklist choice in this PR.
• Disabling of unused fields in specific layouts. The SCG decksheet layout does not use all of the same fields which are used in the WotC format. (specifically, it does not make use of the Event Date, Event Location, and Deck Designer fields) Current behavior is to simply ignore the value of these fields while parsing, but allow further changes to the fields.
• Smooth out added images. For some reason, they show up rather jagged, despite being downscaled from their source images. This may be related to https://github.com/MrRio/jsPDF/issues/762 Closest example?: https://github.com/MrRio/jsPDF/issues/762#issuecomment-231394181
• Utilize the full-resolution StarCityGames.com logo. Currently, for load time consideration, a low-resolution version of the StarCityGames.com logo is loaded, though a higher-resolution copy is available in the repository. Ideally, this image and others should no longer be loaded as base64 strings, but loaded via FileReader or some other API. Ref: https://stackoverflow.com/a/20285053

Finally, due to the update to parsing, there are some changes to existing behavior--primarily small changes in behavior of how unrecognized cards are sorted in lists. As much as possible, the new parsing code behaves similarly to existing code, with the caveat that sorting is not necessarily stable, which likely explains the previously-mentioned sorting discrepancies.

Closes april/decklist#8 Fixes april/decklist#32 Fixes april/decklist#38 Supersedes april/decklist#35 Supersedes april/decklist#39 Supersedes april/decklist#40

[Nightfirecat]

For testing this PR, I've been using variations of the following maindeck and sideboard fields to test a variety of types, colors, unrecognized cards, unparseable lines, duplicate entries, etc. Feel free to use it or use your own testing decks.

Also, this PR is what's available at https://nightfirecat.github.io/decklist

main:

1 Lim-Dûl's Vault
1 mother of runes
1 thalia, guardian of thraben
1 snapcaster mage
1 brainstorm
1 thoughtseize
1 inquisition of kozilek
1 lightning bolt
1 pyroblast
1 Tarmogoyf
2x Tarmogoyf
3 [FUT] Tarmogoyf
1 meddling mage
1 kolaghan's command
1 karn liberated
3 underground sea
1 sensei's divining top
15 plains
SB: 1 misty rainforest
Sideboard
1 Tarmogoyf
2 tarmogoof
3 lose hope

side:

1 liliana of the veil
1liliana of the veil
1liliana of the veil
1 tarmogoof
1 tarmogoof
2 underground sea
5 conflux
1 plains
1 island
1 swamp
1 mountain
1 forest
1 flooded strand
1 polluted delta
1 scalding tarn
1 verdant catacombs

[Nightfirecat]

@april Could you review this when you have some time?

[april]

Thank you so much for the shitton of work that went into this. Sorry for taking so darned long to merge it!

[april]

BTW, you mind if I credit you on Twitter?

[Nightfirecat]

I'm happy to be credited for it, I'm @Nightfirecat there as well.