Merge pull request #537 from rmcgibbo/errmsg

Put current version in import error message.
Fix docstring for topology.select_atom_indices. closes #538
Merge branch 'master' of github.com:rmcgibbo/mdtraj
Fix running test_geometric kernels. closes #491
This fixes it for me
Merge pull request #544 from rmcgibbo/fix-ios-base-import

Fix for #539
Merge branch 'master' into dssp
add -lstdc++ here too
fix test for windows?