tinyxml2-3.0.0-2.1

- Cleanup spec file
  * run spec-cleaner
  * drop not needed dependencies (libtool and doxygen)
  * execute tests during build
  * use pretty name for tarball

- Require pkg-config for pkgconfig() symbols to be generated.
- Drop suggestion for non-existant %name-docs subpackage.

- Initial release (version 3.0.0)