update to Shipping Containers to include all four types of Euro Palette

The existing Euro Palette Type 1 model is preserved, only the README file for the folder updated and images added. Types 2, 3, and 6 are also added and documented in new sub-folders.
.gitignore is updated to exclude .bak files from images being worked on

.gitignore

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 *.FCStd2
 *.FCBak
 Private
+*.bak

Logistics/README.md

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+# Logistics
+
+Items used in the transportantion and storage of goods

Logistics/Shipping Containers/Euro Palettes/README.md

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+# Euro Palette Models
+
+The Euro-pallet standardises storage elements in international shipping.
+There are four types of Euro palette currently in use, Types 1 (the original), 2, 3, and 6. These models were created to work on a large scale storage plan.
+
+## Model Sources
+
+Other models of the standard Euro Palettes are available.
+
+### bytebasher in Tinkercad
+
+Models of [all four palettes are available in one file](https://www.tinkercad.com/things/4vSsBLRCxuP-standard-euro-pallet-all-sizes "Published on Tinkercad")
+.
+
+### bytebasher in Thingverse
+
+The same model is also published on Thingverse to make it more visible.
+
+[![Euro Palette All Sizes](Standard-Euro-Pallet-all-sizes.png "Euro Palette Standard Sizes")](https://www.thingiverse.com/thing:6556863 "Euro Palette Models on Thingverse")

Logistics/Shipping Containers/Euro Palettes/Type 1/README.md

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+# Euro Palette Type 1
+
+The Euro-pallet standardises storage elements in international shipping.  The UNE-EN 13698-1 standard first specified a wooden structure with an overall size of 800 x 1,200 mm.
+
+![Euro Palette Type 1 dimensions](./euro-pallet-dimensions.png "Euro Palette Type 1 dimensions")
+
+There are many methods used for constructing euro-pallets but the standard is constructed from 11 planks and 9 blocks of wood weighing about 25 kg and able to be loaded with up to 1.5 tonnes if it will be carried or up to 4 tonnes if used only as static storage.
+## Model Sources
+
+other representations of the standard Euro Palettes are available
+
+### bytebasher in Thingverse
+model of the Euro Palette Type 1 [![Euro Palette Type 1](./Standard-Euro-1.png "Euro Palette Type 1 published on Thingverse")](https://www.thingiverse.com/thing:6068160)]

Logistics/Shipping Containers/Euro Palettes/Type 2/README.md

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+= Euro Palette Type 2
+
+The Euro-pallet standardises storage elements in international shipping.
+
+The type 2 palette is 1200 x 1000 mm, 20 % larger than the standard type 1 palette. 
+It is the same size as the type 3 but closed on both sides.
+
+![Alt text](Standard-Euro-2.png "Euro Palette Type 2")

Logistics/Shipping Containers/Euro Palettes/Type 3/README.md

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+# Euro Palette Type 3
+
+The Euro-pallet standardises storage elements in international shipping.
+
+The type 3 palette is 1000 x 1200 mm, 20 % larger than the standard type 1 palette, 
+which is the same size as the type 2 but open on the bottom of the short side instead of 
+being closed.
+
+![Alt text](Standard-Euro-3.png "Euro Palette Type 3")

Logistics/Shipping Containers/Euro Palettes/Type 6/README.md

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+= Euro Palette Type 6
+
+The Euro-pallet standardises storage elements in international shipping.
+
+The type 6 palette is 800 x 600 mm, half of the standard type 1 palette.
+
+![Alt text](Standard-Euro-6.png "Euro Palette Type 6")