Bump version to v1.0.1

Merge pull request #15 from stablestud/dev

Make Adsorber update the hosts file inline

Update README.md for v0.5.1

Release of version v0.5.0

Fixed clean.sh

Merge pull request #7 from stablestud/restore-revert

POSIX compliant, Revert to previous hosts file

Fixed typo in script header

Added proper exit codes

Removed unnecessary actions which would slow down the script

Made some warnings more user friendly
Added check if HOSTS_FILE_PATH is  valid