Re-write documentation and all examples of dynamically linked functions. * doc/interpreter/dynamic.txi: deleted. * doc/interpreter/external.txi: Renamed from dynamic.txi. Rewrote or added much information about dynamically linked functions. * doc/interpreter/Makefile.am: Changed dynamic.txi to external.txi in build system. * doc/interpreter/data.txi, doc/interpreter/intro.txi, doc/interpreter/octave.texi, doc/interpreter/sparse.txi: Changed dynamic.txi to external.txi in cross-references. * doc/interpreter/doccheck/aspell-octave.en.pws: Added new words from external.txi to Octave dictionary. * examples/firstmexdemo.c: deleted. * examples/mex_demo.c: Renamed from firstmexdemo.c. Added many more comments to code. * examples/hello.cc: deleted. * examples/oct_demo.cc: Renamed from hello.cc. Added many more comments to code. * examples/Makefile.am: Changed build system to use mex_demo.c and oct_demo.cc. * examples/addtwomatrices.cc, examples/celldemo.cc, examples/embedded.cc, examples/fortdemo.cc, examples/funcdemo.cc, examples/globaldemo.cc, examples/helloworld.cc, examples/mycell.c, examples/myfeval.c, examples/myfunc.c, examples/myhello.c, examples/mypow2.c, examples/myprop.c, examples/myset.c, examples/mysparse.c, examples/mystring.c, examples/mystruct.c, examples/paramdemo.cc, examples/standalone.cc, examples/stringdemo.cc, examples/structdemo.cc, examples/unwinddemo.cc: Use Octave coding conventions for code. Fixed all compilation errors and warnings.

--- a/examples/mystring.c
+++ b/examples/mystring.c
@@ -2,25 +2,24 @@
 #include "mex.h"
 
 void
-mexFunction (int nlhs, mxArray *plhs[], int nrhs, 
-             const mxArray *prhs[])
+mexFunction (int nlhs, mxArray *plhs[],
+             int nrhs, const mxArray *prhs[])
 {
+  mwSize m, n;
   mwIndex i, j;
-  mwSize m, n;
   mxChar *pi, *po;
 
   if (nrhs != 1 || ! mxIsChar (prhs[0]) || 
       mxGetNumberOfDimensions (prhs[0]) > 2)
-    mexErrMsgTxt ("expecting char matrix");
+    mexErrMsgTxt ("ARG1 must be a char matrix");
 
   m = mxGetM (prhs[0]);
   n = mxGetN (prhs[0]);
   pi = mxGetChars (prhs[0]);
-  plhs[0] = mxCreateNumericMatrix (m, n, mxCHAR_CLASS, 
-                                   mxREAL);
+  plhs[0] = mxCreateNumericMatrix (m, n, mxCHAR_CLASS, mxREAL);
   po = mxGetChars (plhs[0]);
 
   for (j = 0; j < n; j++)
     for (i = 0; i < m; i++)
-      po [j*m + m - 1 - i] = pi [j*m + i];
+      po[j*m + m - 1 - i] = pi[j*m + i];
 }