replace #!/bin/sh by #!/bin/bash
replace echo by printf

See comments to individual commits.

Replace echo by printf at remaining locations, where echo is used with options
(as could be located by git grep). Seitosh should now be clean with respect to
shell usage.

Citation from the POSIX manual for printf as a motivation for this set of
changes:

RATIONALE
  The printf utility was added to provide functionality that has histori-
  cally been provided by echo. However, due to irreconcilable differences in
  the various versions of echo extant, the version has few special features,
  leaving those to this new printf utility, which is based on one in the Ninth
  Edition system.

Let lisousi provide format specific usage text from libdatrwxx.

Merge branch 'master' into issue10

The echo shell builtin of the traditional Bourne Shell does not recognize the
-e option. Better use printf in this case.

From the POSIX manual for printf:

RATIONALE
  The printf utility was added to provide functionality that has histori-
  cally been provided by echo. However, due to irreconcilable differ-
  ences in the various versions of echo extant, the version has few special
  features, leaving those to this new printf utility, which is based on one in
  the Ninth Edition system.

Since $() command substitution already is specific to bash and not available
in standard Bourne Shell, replace shell in which shell scripts shall be
executed by /bin/bash.

End-user documentation for lisousi shall be improved on this branch.
Add a step-by-step example for the sparse receiver array example, testcase
Bietigheim.

On this branch issue14 will be resolved:

do not rely on /bin/bash
------------------------

Parts of the project rely on /bin/bash being the standard shell and /bin/sh
being a synonym for /bin/bash.

 *  This is the case in shell scripts, which use bash-specific commands and
    keywords.
 *  This is the case in Makefiles, which use constructs like 'echo -e' to
    format multiline string output.

The problem can be solved by:

 *  replacing '#!/bin/sh' by '#!/bin/bash' in shell scripts
 *  replacing 'echo -e' by 'printf' in Makefiles

compile.sh will not execute in traditional Bourne Shell. Explicitely request a
version of the Bourne Again Shell.

the fixed wavelet engine ist not yet implemented

After implementation of full usage information for end-users and ouput of
usage texts in soutifu, modifications are merged into master.

A comprehensible textual description of what actually is done in the procude
is still missing.

The weight factors are applied in terms of signal amplitude not in terms of
signal energy. Where factors are to be applied to energy values, they have to
be squared prior to the operation.

weight factor is defined in terms amplitude; apply square of weight to signal
energy

The compound information is composed from different sources but must be
reasonable as a whole.

The usage text strings already contain a terminal newline.