feature: working branch of features from @ianwdunlop#4

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davidjrice wants to merge 4 commits intomasterfrom

Commits on Apr 13, 2024

extra code to deal with Manchester GMPTE extras eg ZD, ZS, ZA

ianwdunlop
authored and
davidjrice
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changes for the GMPTE codes

ianwdunlop
authored and
davidjrice
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parse file line by line with case statements.

ianwdunlop
authored and
davidjrice
committed
parse additional types of records

ianwdunlop
authored and
davidjrice
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