Merge pull request #4 from jonathanworth/master

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Merge pull request #9 from ollieflumeland/master

Update - 280313
updated calc so it works
Merge pull request #5 from jonathanworth/master

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update menu so you can find stuff!!
Merge pull request #6 from ollieflumeland/master

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Merge pull request #4 from jemble/master

distance calcs