ProPresenter 7 Support

[ChrisMBarr]

ProPresenter 7 files are in a totally different format than any previous versions, which were XML based. This new file format is binary and not easily parsed at all, especially not the way thie project dealt with the previous versions. Currently I am unfamiliar with parsing or building files in a binary format, so I am most certainly open to suggestions and PRs!

There are some very good blog posts about the ProPresenter 7 file format by @greyshirtguy and his efforts to extract data using C#: Part 1 | Part 2 | Part 3

His C# project to do the parsing is here: https://github.com/greyshirtguy/ProPresenter7-Proto

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For anyone not familiar, I use this project along with other lyric presentation format parsers/builders on my LyricConverter project here: https://github.com/FiniteLooper/LyricConverter | http://lyricconverter.net

I would love to get ProPresenter version 7 support in there as well... but this whole binary file format makes it difficult. I am calling on the help of anyone who knows a good path forward here! @greyshirtguy, I'd love to hear your input as well if you have any.