Merge pull request #1 from gfon/master

Calc fixes from gfon
excel: Write python-code in a temp-file and execute it.

* ver 0.0.3-beta.3 --> 0.0.4-alpha.1
* docs: Add expected , model-columns for engine-points.
* excel: Track VBA-code in git as separate files.
Properly fit measured_eng_points.

* core: 
** Restructure processor code for readability.
* model: Rename fitted_map --> fitted_eng_map
* model: Rename fitting-params --> coefficients.
* log: Fix log-names.
FIX sample-bat script.

* cmd: Add NOTICE log-level and lower output by default.
* winmenus, excel: Keep window open after creating ExcelRunner.
docs: Add Code-ref section.

* Improve installation guide.
* Remove @author from file-headers.
excel: FIX Excel-refs parsing when miss sheet_name.

** FIX bug also in **kws.
** tests: Add test for excel-xwings.
** docs: Add BNF syntax.
* cmd, log: Remove extra notice-level, use 'trace' instead.	
* pdcalc: BUG DISCOVERED in cyclic-deps but feasible calc.
core, model: Add Param for robust-fit.

* excel: Add html-link to RTD-doc site.