docs: Specify python-ver in Quickstart
core: use `setitem` operator in pdcalc funcs.
build: Untrack Eclipse files.

* build: Minor changes due to LAT visit.
* docs: Forgotten renamings of `Docs` folder.
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.
docs: Scientific review by Fontaras.
build: Gather all requirement-files into a new folder.
0.0.6: Prepare for release.

- docs: Add "Last Updated" field in footer.
core: RENAME PMF-->BMEP