Merge pull request #5 from stoduk/master

Save the last entered config at the end of config block, so it is uploaded to MoPi last
fix https://github.com/hamishcunningham/pi-tronics/issues/8 by being more conservative making backups of modules and blacklist config
snapshot 3.5+8
Changes to how -rc/-rc1/-rc2 work in labeled mode for issue #6
snap 359 with fred fix for config reads issue