Release of ESCAPE 0.9.1
-------------------------

We are pleased to announce the new release of ESCAPE version 0.9.1.

Below is the list of the changed/added features:

1. Added functors for paracrystal and hard sphere structure factors
2. Added `reftrans` module for the calculation of Fresnel coefficients and wave function in layers
3. Updated and improved material database `utils.mdb`
4. Added `escape.require` method for the version check of `ESCAPE`
5. Improved `conditional` functor
6. Bug fixes