docs: Mention eclipse and rename sample project-files.
0.0.5-->6-alpha.1: 

* model: Validate fit-params.
** Remove unused '/params/fitting/fit_opts`.
** ,excel: Move /params/is_robust --> ./fitting/is_robust
* cmd: Check runs under Python-3.3+.
* test: Improve sample shell-scripts.
* docs: Update changelog.