Provide new constructor parameter and new query functions.
Provide a test program for RNGgaussian.

GSL provides a set of different random number generators. The type to be
used can be selected through environment variables. With the new
parameters provided by RNGgaussian, the calling program may select the
type.

uniform usually applies to the random distribution, not to the frequency
distribution. What is computed is random numbers with a gaussian
distribution, not with a uniform distribution.

The computation of coherence for white gaussian noise is appropriate to
demonstrate the effect of averaging applied to the the numerical
compuation.

- provide option to select Fourier domain cross correlation
- provide coherence compilation plot

By setting the seed value for the random number generator explicitly we
can reproduce the random number time series. This lets us exactly
reproduce the value used for the publication on TCCA approximation
errors.

With the new UIPC software installation on 2019-07-30 the name of
channel 31 was changed from LHeLvl to LHe-Alt, which gives a proper
distinction to LHe-Lvl. With the new library version LHeLvl and LHe-Alt
both are translated to LHX.

Adjust doc-markers such that GPL phrase is not included in libttsynt.doc.
Remove obsolete CVS keywords.
Adjust make rule for libttsynt.doc to include include-files and separate
sections from different files.

The dims variable passed to function mxCreateStructArray was declared int,
while the declaration of mxCreateStructArray makes the compiler expect a
variable of type const mwSize*

Apparently /bin/logger is confused, if the tag parameter contains
several whitespace-separated strings. It behaves very much like the
logger function, if a single string "DL1logger" is passed as tag.

this is just a quick hack unfortunately; the code and in particular
diagram settings require a major revision

The log_frequency scale cannot contain exactly the requested number of
values for the lowest decade. This test mode allows to check whether the
higher value decades are affected by this. They are not.

The reason for not producing the requested number of value is, that the
smallest frequency on the logarithmic scale than would be smaller than
the smallest value on the linear scale. So log_frequency lets the
smallest value of the logarithmic scale be as small as the smallest
value of the linear scale, but not smaller.