Add C++11 allocator overloads to avoid implicit conversions.
Placement new must use void* to avoid user-specific overloads.
Merged eigen/eigen into default
reduce false negative in the qr unit test
Upload the 3.2 testing result to its own CDash project
optimize sparse-sparse Kronecker product
Merged in martinhofernandes/eigen (pull request #40)

Better fix for bug #503
Fix infinite loop in sparselu