Leave todos.
Merge branch 'master' of github.com:geodynamics/aspect into compressible_perplex
Update steinberger material model to run with the new material model interface (calling also viscosity for the creation of the adiabatic conditions).
Add experimental support for compressibility in the steinberger material model.
Merge branch 'gplates_cookbook_patch' into compressible_perplex
Added functions to simulator access that return the surface pressure input parameter.
Small bugfixes in lookup class of steinberger material model.
Changed steinberger material model to new interface. Made the incompressible formulation consistent and added a compressible formulation.
Viscosity is now only called if adiabatic conditions is available. No need to check for that in function any more.
Add radioactive decay plugin

Add radioactive decay plugin.
Add postprocess plugin to output change in average heating rate.
Add function in simulator_access to get the pointer of heating model.
Bug fix

Add missing header
Rename some variables for clarity.
Bug fix
Change postprocess

Change file and class names to internal heating.
Add visualization plugin.
Change internal_heating.h

Bugfix on class names
Put seperate heating rate on crust and mantle
Bugfixes
Bugfixes
Bugfix
Bugfix

Missing conditions on composition loop.