Added: Clone and Import tools have "Copy Biomes" option.

Biomes are always exported into schematic files when possible.
Fixed: IndexError when using "show hidden ores" with extended IDs.

Change 256 to id_limit in alternate material tables
Fixed: All "Future Block!" showing up as a single entry in Analyze.
Submodule pymclevel updated.

Submodule pymclevel:
    > 598ff5d - materials.idStr now maps block IDs to idStr.
    > fd1c642 - Added: idStr in materials.yaml is now minecraft's internal name for each block.