add function to split multiarray into blocks
implement mapping stage and visitBorder
Merge branch 'coupled_iterator_fixes' into view-blockwise-labeling
finish blockwise_labeling impl (untested)
Merge branch 'coupled_iterator_fixes' into view-blockwise-labeling
Merge branch 'coupled_iterator_fixes' into view-blockwise-labeling
finish blockwiselabeling for standard multi arrays (untested)
Merge branch 'master' into view-blockwise-labeling
make tests pass for unsigned labels and direct neighborhood
quick-and-dirty fix (untested)
Merge branch 'signed-union-find-fix' into view-blockwise-labeling
also use signed labels in test
fix bug that caused failure of IndirectNeighborhood test#s
fix function names not conforming to vigra conventions
add pixel-level difference for visitBorder
Merge remote-tracking branch 'upstream/master' into blockwise-watersheds

Conflicts:
	test/CMakeLists.txt
blockwise labeling implemented (missing test for ChunkedArray)
Merge branch 'master' into view-blockwise-labeling

Conflicts:
	test/CMakeLists.txt
add missing namespace, fix include guards
Merge branch 'view-blockwise-labeling' into blockwise-watersheds