Freethinker (WIP) updated !

Updates done :

• IWAD (main data file) updated from Blasphemer 0.17 to Blasphemer 0.18 (february 2023) : https://github.com/Blasphemer/blasphemer/releases/tag/v0.1.8
• PWAD (bonus maps) : I've changed two of the bonus adventures, using MALICE and SHADOWCASTER (full episodes) instead of "Valley of Saints" and "The Crypts" (single maps)