Update README.me to add usage instructions
Update README.me to add usage instructions

The usage instructions were previously in the wiki but it seems better to include them right in the README.md file since clones will want to have that info.

Signed-off-by: Brent Nelson <d915f4e970e53654202c1cf5c62e60a7280a8219@ee.byu.edu>

SymbiFlow/prjxray-bram-patch,SymbiFlow/prjxray-bram-patch,SymbiFlow/prjxray-bram-patch