Fix OBC 1.4.6 mapping caused by Maven relocation. Closes #186.

Maven shade relocation was rewriting our string literals, so the
OBC mapping was incorrect and not used.

Similar issue had to be fixed in CB for jline:
https://github.com/Bukkit/CraftBukkit/pull/883

Prevent the relocation by writing the strings as char arrays.

Improves compatibility with 1.4.6 plugins. Fixes LiquidDestroyer
crash on TNT explosions.