See github.com/libAtoms/ASE.jl/releases/tag/v0.5.1 for release notes

See github.com/libAtoms/ASE.jl/releases/tag/v0.5.0 for release notes

See github.com/libAtoms/ASE.jl/releases/tag/v0.4.1 for release notes

See github.com/libAtoms/ASE.jl/releases/tag/v0.4.0 for release notes

fix stress and virial computations

fixing readme

Merge pull request #7 from dussong/gd/add_example

adding example for Si.

fixing travis