0.3.3

Changed

• Installer can now successfully stop existing SetMod (>= 0.3.3) during upgrades. Note that you'll still have to quit the previous version of SetMod if it's 0.3.2 or lower.
• Fixed issue where non-mods cannot request songs without stream currency enabled even though song/*/min-currency was set to 0.
• song/*/max-duration is not optional and unset by default, and can be deleted.