Changes:
* The function setSearchPath has been added to the library
process.s7i.
* The compiler has been improved to write an error message, when the
sets of a case-statement overlap. Until now this situation was only
recognized by the C compiler.
* The interpreter has been improved to raise an exception, when the
current value of a case-statement is element of two sets.
* There have been changes in the libraries makedata.s7i and make.s7i.
* The macro expansion in makedata.s7i has been changed. Now all macro
expansions (except the expansions of internal macros) are done with
the function applyMacros.
* In makedata.s7i the function applyMacros has been improved to
process the makefile macro functions wildcard, error and warning.
* The functions evalFunction and getMacro, that where used to do
macro expansion when the makefile is read, have been removed.
* The code to read the definition of recursively expanded variables
has been changed to do no macro expansion. This macros are expanded
when they are used.
* The library make.s7i has been improved to read the parameters
for the commands rm, cp, and mv as Unix shell parameters (with the
function getUnixCommandParameter).
* The library make.s7i has been improved to read the parameters
for the commands del, copy, xcopy and move as Dos/Windows batch
parameters (with the function getDosCommandParameter).
* Interpreter and compiler have been improved to support the action
CMD_SET_SEARCH_PATH.
* The batch file bin/call_gcc.bat has been changed to work correctly,
when it is called from any directory.
* Writing error messages in error.c has been changed to use prot_...
functions instead of printf.
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