Binary file C2Ray_1D_test (compiled program) removed from repository
Switched back to standard version with 5 redshifts and dt=10 Myr.
More standard version of Makefile.
Fixed bug when reading temperature data upon a restart

1. Wrong filename specified (temper3d instead of Temper3D)
2. Reading the whole temperature_grid(:,:,:,0:2) array instead
   of only temperature_grid(:,:,:,0)
Several minor changes

1. Better handling of the reporting of source properties. Only report
   on types of sources actually being used.

2. Introduction of df_heat variable in response to peculiar behaviour
   when adding rates to f_heat directly. This remains mysterious

3. Reformating and removal of unused variables
Added protection routine for ionized fractions.

Fixed bug in reading the temperature data upon a restart
Removal of tab characters (non-standard)

Removal of unused variables

Triggered by compiling with gfortran compiler with all warnings on.
Added test on iteration counter when checking for global convergence
to ensure that at least two iterations are done.

Decreased the limit for checking for photon losses from subbox
to 1e-10 of total flux (testing whether this works with test
problem).
Changes to make the 1D modules accept the new variable names from
c2ray_parameters, cgsconstants, etc.

General synchronization between 1D and 3D modules.
Added gfortran to Makefile with decent set of compiler options.

The warnings are useful for detecting tab characters and unused
variables
Update of photon_loss_src (photon loss per source) calculation.
It was originally assumed we would track this for each frequency
subbin, but this is not actually the case.

The use of a frequency dependent photon loss did interfer with
the checking of losses from subboxes as the code never used
more than one subbox.

Changed the photon_loss_src variable from array to scalar and
testing it now with subbox criterion. For the standard test
problem we seem to loose about 0.5% from the box. This implies
that we can use subboxes to test for loss of photons, because
it is not a very small number.