Revert "Fixed all problems with libtcod 1.5.1."

This reverts commit 2c4586d660e4a6951483468c53f57d49bff93b49.
Revert "Updating dev to 1.5.1. Fuck code, though."

This reverts commit 65d37959d30f103af4e51db09faa5b5ca1fa8c4e.