Add v0.4 schematic PDF

Update README for v0.4

More schematic updates. Remove old KiCad files

Update Readme for version 0.4

Version 0.4: Update chipset connection

Version 0.3: Update DRAM schematic, pull-ups/pull-downs, CPU configuration jumpers

Version 0.2: Update cache schematic

Update README.md

Create README.md

Version 0.1

Initial commit