Changes:
* The chapter in the manual about the foreign function interface has
been improved.
* A paragraph about regular expressions and lexical scanner functions
has been added to the FAQ.
* The handling of the actions CHR_CLIT and INT_STRI in the compiler
has been improved. The string buffers for chrCLitToBuffer and
intStrToBuffer use the correct alignment now.
* In big_rtl.c the functions bigParseBasedPow2 and bigParseBased2To36
have been added and bigParseBased has been changed to call them.
This improves the conversion of a string to a bigInteger, when the
base is a power of two. Valgrind measurements of the function
bigParseBased in chkbig.sd7 show a speed improvement with a factor
of 239.
* The macros memcpy_to_strelem and memset_to_strelem (defined in
striutl.h) have been turned into functions (defined in striutl.c).
* The unrolling in memcpy_to_strelem and memset_to_strelem has been
changed from 8 times to 32 times. This improves the performance
for big data amounts by 16% (Measured with valgrind and gcc).
* Usages of the macros memcpy_to_strelem and memset_to_strelem in
bst_rtl.c, fil_rtl.c, soc_rtl.c and str_rtl.c have been turned into
usages of the corresponding functions.
* Calls of cstri_expand, ustri_expand, cstri_expand2 and
ustri_expand2 in analyze.c, chr_rtl.c, flt_rtl.c, infile.c,
str_rtl.c and striutl.c have been turned into calls of
memcpy_to_strelem.
* The functions (macros) cstri_expand, ustri_expand, cstri_expand2
and ustri_expand2 have been removed from striutl.c and striutl.h.
* The functions doCompileAndLink, compileAndLinkWithOptionsOk,
compileAndLinkOk, appendToFile and detemineDatabaseDefines have
been added to chkccomp.c. The function compilationOkay has been
replaced by compileAndLinkOk.
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