Dmitry Malyshev / gammalib

…on older systems, such as CentOS 5)

The GModelTemporalFunc implements a temporal file function for the simulation of transient sources.

The GModelSpatial::region() method returns a pointer to a sky region that fully encloses the spatial model component.

Changed method name component_scale() to scale(). Changed member names from m_component_names to m_names and m_component_scales to m_scales.

# Conflicts:
#	AUTHORS
#	include/GTools.hpp
#	src/support/GTools.cpp

The GFft class implements a one-dimensional Fast Fourier transformation. The GFftWavetable class is a support class for GFft and holds the trigonometric coefficients for a factorisation.

An initial implementation of the GNdarray class has been added that implements a n-dimensional double precision floating point array.

…d gammalib::rstrip_chars() function

The gammalib::str() floating point conversion functions now make sure that no precision is lost in a string conversion (well, roughly).

…ent() method since it was actually not needed, added check for unique name of model components, added function to find out if a string is contained in a list of strings to GTools

Time setting and getting methods for Julian Days, Modified Julian Days, native seconds and native days are now available that allow specifying the time system. Currently, TT, TAI and UTC are supported.

Methods have also been added that return the Greenwich mean and apparent siderial times, and the local mean and apparent siderial times that depend on the geographic longitude.

Finally, a now() method has been added that sets the time to the current time.

…ients argument (#1847)

The eval_gradients() methods duplicate much of the code of the eval() methods. To increase the maintainability of the code, the eval_gradients() methods have been removed, and the computation of partial derivatives is now done by the eval() methods if the optional gradients argument is set to true.

…d corresponding  unit tests