Thierry Louge / gammalib

The GApplication::log_parameters() method now takes a mandatory GChatter argument to enable displaying of parameters only above a given chattiness level. This avoids a log-level check in the client code. For the same purpose, the GApplication methods log_string(), log_value(), log_header1(), log_header2(), and log_header3() have been introduced (#1828).

… including docs and unit tests

  - New naming scheme.
  - New utility functions/constructor supporting cutoff-energy.
  - Usage of new helper functions for xml read-in/write-out.

The GModelSpectralRegistry::alloc() method now also checks for the existence of model parameters and allocates the appropriate model from the registry that is found in the XML file base on model type and parameter names. This allows now to have the same model type but different parameter names in the registry.

The spectral model classes have been adapted to the new logic, and models have been added to the registry for all parameter combinations that may exist.

The unit tests and documentation have been updated.

Remove the m_names members from the spatial, spectral and temporal registry classes and directly use the model type to find the appropriate model. The alloc() method now throws an exception if the model is not found. The new logic helped to reduced the code in the client classes (#1824)

This is in anticipate of the model name changes in release 1.2

This is an anticipation of the renaming of the spectral models that will come in release 1.2.

It seems better to not introduce the alias method but to use a type constructor instead. This allows writing out the same model type that was read in, enhancing the compatibility with the legacy XML format.

The following new names have been introduced for the spatial model components:
* "PointSource" (alias: "SkyDirFunction")
* "RadialDisk" (alias: "DiskFunction")
* "RadialGaussian" (alias: "GaussFunction")
* "RadialShell" (alias: "ShellFunction")
* "EllipticalDisk"
* "EllipticalGaussian" (alias: "EllipticalGauss")
* "DiffuseIsotropic" (alias: "ConstantValue")
* "DiffuseMap" (alias: "SpatialMap")
* "DiffuseMapCube" (alias: "MapCubeFunction")

Added GWcsSIN class.

Hyphens are now stripped in the constructor and added back by the write() method.

# Conflicts:
#	ChangeLog
#	NEWS

In the introduction of the GSkyMap::shape() method, a change was introduced that led to writing single maps as 3D images. The code was modified so that the original behaviour of writing 2D images was recovered.

This replaces two arguments:
- naxis: the dimension of the image
- naxes: a pointer to an array containing the number of pixels for each dimension

…id pointer being free'd (not clear why this is the case)