Johan Bregeon / gammalib

…d corresponding  unit tests

The application name and version were cleared in a call of the GApplication::clear() method, but these properties should be conserved. Now they are, and a call of the GApplication::clear()  will perform the same actions than a call of the name and version constructor.

The optional linefeed parameter allows to terminate the string with (default) or without a linefeed.

Python does not understand GChatter, the type is casted to int.

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).

# Conflicts:
#	ChangeLog

Python wrappers have been always removed when typing "make clean", even if the wrappers have been shipped with the code. This has been corrected and Python wrappers are now only remove if they actually have been built (and hence if they have not been shipped with the code).

… 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.