- rename flag BORNAGAIN_RELEASE -> BORNAGAIN_CONFIGURE_DOXY
- write configured Doxyfiles to auto/Doxygen

* Make names more uniform: FormFactorRipple1* where *=Box,Gauss,Lorentz
* Implementation through inheritance from ProfileRipple1
* Form factor in elongation direction x computed in namespace ripples

adapt GUI to change of FormFactorDot argument

Color map now 'inferno', as in paper.
Intensity scale reduced from 10^-10..1 to 10^-8..1.

Also, some additions to the index.

image pdf

No longer needed, as this index refers to form factors only

(document analytic formula as newly implemented;
mention old numeric method in History section)