support firm up XML descriptor into C++ code

[GoogleCodeExporter]

In current releases (1.0/1.1), encoded descriptors are saved to text files.
Users can directly use these files as descriptors (and eliminate the needs
of XML parser). User can also copy the text of a descriptor file into C++
source code and have the text as a quoted string, for instance:

    const char* descriptor = "pococtx:.........";

And pass this string descriptor to the POCO_AppContext::create() method.

This requires one to edit the source code manually. An option the
PocoCapsule descriptor encoder (i.e. pxencode.exe) could provide is to
directly generate the above C++ code. 

Original issue reported on code.google.com by kjin...@gmail.com on 31 Mar 2010 at 5:25

[GoogleCodeExporter]

target for 1.2

Original comment by kjin...@gmail.com on 31 Mar 2010 at 5:29

[GoogleCodeExporter]

Original comment by kjin...@gmail.com on 31 Mar 2010 at 9:42

• Changed title: generate encoded descriptor as string of C++ code

[GoogleCodeExporter]

Original comment by kjin...@gmail.com on 4 Apr 2010 at 5:19

• Changed state: Started

[GoogleCodeExporter]

Original comment by kjin...@gmail.com on 4 Apr 2010 at 6:40

• Changed title: support firm up XML descriptor into C++ code