MysteriumLib

Should work fine now.

• The library acts as coremod to make it load faster compared to 1.0.
• Added the "allThatExtends" property compared to the built-in version of the lib.
• Made the file name start with "!", this ensures that the library is loaded before other mods. (Used to be a "." instead, but it causes issues on certain systems and the file was renamed when downloaded anyways)
• Changed the mcmod.info file to tell people to check the file name.