Restore output redirect for synth step (deleted by accident).
Checking status w/ EOS-S3 updates .. DNM!
Change instructions around INSTALL_DIR.
Update formatting to rst not md.
More formatting fixes, mostly for ..code.
Now use $INSTALL_DIR/xc7 and $INSTALL_DIR/eos-s3.
Formatting & instructions update.
Signed-off-by: Tim Callahan <tcal@google.com>