Technical bits

Technical enhancements made on the design:

1. All the elements in the design were put in the same (and only) "0" layer;

2. A lot of problems caused by non-correctly closed lines were fixed;

3. Some useless lines were deleted as they were identical and overlayed or lined up together (and for this reason they were replaced by a single longer line);

4. All closed lines were converted into polylines;

5. Every piece was converted to a block which has a sintetized but meaningful name;

6. Every block was saved in a separate file, allowing it to be modified independently from the rest of the design.