Updated BOM.xlsx

Did some statics on the Plate to see how strong it is.
Found couplings for motor and pump. Unsure of pump keyway size, so got the larger option.
Added Thumbs.db to the .gitignore file.
Updated the BOM:
Added 7 segments
Added a i2d driver for 7 segments
Sorted by who should order

Working on presentation. Needs a lot of work.