README: Fix obvious formatting issues and typos
drwxr-xr-x - KiCad
-rw-r--r-- 35149 LICENSE
-rw-r--r-- 32421 README.md
drwxr-xr-x - SPLD
drwxr-xr-x - doc
drwxr-xr-x - gerber
drwxr-xr-x - printed_parts
drwxr-xr-x - software