Clarified some comments.
The /butcher command no longer kills mobs with a name tag.

This behaviour can be overridden with the new -t flag.
The -f flag encompasses this flag.
FlatRegionApplicator -> FlatRegionVisitor.
Added CombinedMask(Mask ...mask) constructor.
Added BoundedYMask that requires that Y is in a range.
Added FuzzyBlockMask, which uses BaseBlock.containsFuzzy.
Added BlockCount, which counts the number of blocks matching a mask.
Aded BlockReplace, which replaces blocks with a pattern.
Added various visitors (BFS, Downward, Recursive, Region).
Added OperationHelper.completeBlindly().
Changed //count, //fill, //fillr to use visitors.
Added more flexible wildcard support to BaseBlock.
Added limited wildcard mappings for certain blocks.
Patched various occurrances of -1 to use BaseBlock.wildcard.
Made //replace use containsFuzzy.
Added proper mask support to WorldEdit.getBlock.
Merge branches 'extended-fuzzy2', 'tag-butcher' and 'visitor' into develop