lib

The migration is based on gSOAP advantages against cSOAP/libxml2:
* supports HTTP proxy servers.
* supports HTTP proxy basic authentication.
* gSOAP is statically-linked library.

For those reasons, libxml2 and cSOAP are no longer used.

gSOAP library includes two compiler tools to develop web services:
* The 'wsdl2h' WSDL parser. This tool converts WSDLs and XSD files into
  annotated C/C++ definitions.
* The 'soapcpp2' stub and skeleton compiler. This tool generates RPC
  code and XML serializers from the annotated C/C++definitions.

Signed-off-by: Danilo K. S. Yorinori <danilok@c3sl.ufpr.br>