MAINT: remove an old deprecated qr implementation that has been deprecated for several years
Merge pull request #3257 from argriffing/remove-deprecated-old-qr

MAINT: remove an old qr implementation that has been deprecated for several years
Merge pull request #3253 from jnothman/neg_axis

BUG: sparse: support axis=-1 and -2 for sparse reduce methods
BUG: sparse: Numpy < 1.8 compatibility
TST: sparse: extend sum & minmax test diversity
BUG: sparse: fix dtype of bsr_matrix.transpose of an empty matrix
Merge branch 'pr-3248' into pr-3248-merge

Conflicts:
	scipy/sparse/data.py
	scipy/sparse/tests/test_base.py
TST tests for non-canonical input to sparse matrix operations
TST correct logic for noncanonical sparse tests
TST add known failures for non-canonical sparse matrices