v0.1.6 - Stable release

Changes:

• Security fixes (now clients cannot download libraries unless they are superadmins)
• Library will now not load lib.lua on the server if the library is client-only
• Added hooks LibLoader.Installed - called when library is installed and LibLoader.Loaded - called when library is successfully loaded
• Changed the hint after installation. Now it is easier to copy the command to enable the library