Before this change user defined defaults are overwritten by the
global defaults if init is called twice. Now global defaults are only
applied if the parameter doesn't already exist.

Feature/fix parameters

Closes #720

See merge request !1632

[staggered][scvf] Replace virtualBoundaryFaceDofPos by laterFaceCenter

See merge request !1631

Feature/improve parameters

See merge request !1628

* is defined for all scvfs, not only for those on a boundary
* remove redundant code

[io][grid] Allow SubgGrid to create grids from binary images

See merge request !1592

Timo Koch authored Jun 01, 2019 and Kilian Weishaupt committed Jun 02, 2019

Based on initial work by Kilian Weishaupt

Based on initial work by Kilian Weishaupt.

[gitlab] Add templates for issues and feature requests / merge requests

See merge request !1629

[io] Add RasterImageReader

See merge request !1612

[fix][projector] Do not insert into empty matrix

See merge request !1627

Feature/linspace

Closes #715

See merge request !1624

[newton] Allow to change minimum number of Newton iterations

Closes #659

See merge request !1582

Feature/explicit diagonal solver

Closes #563

See merge request !1601

[newton] optional enable interactive newton output

Closes #718

See merge request !1621