- src/Makefile: Fix indentation.  Fix terminology of PREFIX and LOCALBASE.  Replace all usages of PREFIX with LOCALBASE, and DEST_PREFIX with PREFIX.  DEST_PREFIX is obsolete.

- src/args.c: Default to font bitstream vera sans mono instead of liberation sans mono.

- src/config.mk: Increment version to 0.8.1.  Fix indentation.  Fix terminology of PREFIX and LOCALBASE.