TimeLib

Additions:

• Added an 'uninstall' function for removing scoreboards & data storages
• Added a message to the 'init' function

Changes:

• Updated README.md to reflect the changes
• Slightly altered a note in "unixlib:unix/update" to reflect newer versions

Bugfixes:

• Removed an optimisation when calling "unixlib:unix/update" that could under rare circumstances prevent newer Unix Timestamps from player heads from being detected