Added imports for scipy's discrete sine transform functions to the
scipy_fftpack interface.
Silenced the import error when importing the discrete sine transform functions from scipy.fftpack so that the Travis build works properly.
Merge branch 'master' of https://github.com/hgomersall/pyFFTW into dst_imports
Merge pull request #42 from insertinterestingnamehere/dst_imports

Discrete sine transform imports