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/myfeval.c
+++ b/examples/myfeval.c
@@ -1,24 +1,23 @@
 #include "mex.h"
 
 void
-mexFunction (int nlhs, mxArray* plhs[], int nrhs, 
-             const mxArray* prhs[])
+mexFunction (int nlhs, mxArray* plhs[],
+             int nrhs, const mxArray* prhs[])
 {
   char *str;
 
   mexPrintf ("Hello, World!\n");
 
-  mexPrintf ("I have %d inputs and %d outputs\n", nrhs,
-             nlhs);
+  mexPrintf ("I have %d inputs and %d outputs\n", nrhs, nlhs);
 
   if (nrhs < 1 || ! mxIsString (prhs[0])) 
-    mexErrMsgTxt ("function name expected");
+    mexErrMsgTxt ("ARG1 must be a function name");
 
   str = mxArrayToString (prhs[0]);
 
   mexPrintf ("I'm going to call the function %s\n", str);
 
-  mexCallMATLAB (nlhs, plhs, nrhs-1, prhs+1, str);
+  mexCallMATLAB (nlhs, plhs, nrhs-1, (mxArray*)prhs+1, str);
 
   mxFree (str);
 }