Fix visitor unit test.
Remove erroneously committed debugging stuff.
Fix segfault in SparseBlock::InnerIterator
Output random generator seed in case of failure so that we have it in CDash.
conservative_resize unit test was executed only once
Fix bug 483: optimize outer-products to skip setZero and a scalar multiple when not needed.
Fix the computation of the default pivot  threshold for sparse QR
Add reference for the default threshold in sparse QR
bug 482: pass scalar arguments by const references. Still remains a few cases that might affect the ABI (see the bug entry)
Fix bug 552: disable EIGEN_GLIBC_MALLOC_ALREADY_ALIGNED when compiling with -fsanitize=address, and allow users to manually tell whether EIGEN_MALLOC_ALREADY_ALIGNED.