added subcorpus_remover (for making barcharts, for example)
added subcorpus_remover (for making barcharts, for example)


Former-commit-id: 1214cc1a9d4f15e9a363c671348aa1a3eeeffc05 [formerly 95c2ae6488d4dab6e6606923cab7801eb17008b7] [formerly 95c2ae6488d4dab6e6606923cab7801eb17008b7 [formerly 95c2ae6488d4dab6e6606923cab7801eb17008b7 [formerly 6939498a7cc04a6046c42a8e31eb1f1f8e28afdb]]]
Former-commit-id: 63c940191c09ad6760a6d739b03a0a4235fd8a41
Former-commit-id: ca7563bb45056efbaf2f482e70b83953598850ce [formerly 9130c6e5b0710b07384466f8fb254c28b18db685]
Former-commit-id: e1f12926f55db311815152318ab0e73335acd232
interrogator/corpkit,interrogator/corpkit