Rename for conversion to rst format.
Convert to rst markup.
fix short description of the license.
BNL license text approved by Dorene.

To be merged to each diffpy package repositories.
Updated CU trustees name.
Rename LICENSE.txt --> LICENSE_DANSE.txt.
Add BNL license text.

Merge branch 'license' from diffpy-release.
update doc and api doc 1.1b1
Use version.cfg when git is not installed