Test for sub matrix access
Implement sub_view
Prepare more complex test
Pass the test
Improve support for sub_view
Again another test
Merge branch 'master' into sub_matrices
Complete the sub_view traits
Fix traits chaining
Note for later
Reorder
Easier scheme for sub linear access
More complete test
New traits: dimensions
Test the new traits
Fix
Test traits on high dimensional matrix
Fixes for traits
Prefer libc++ with clang
Merge branch 'sub_matrices'