Merge of devel - 1.1 release

Merged devel into master ready for 1.1 release.

Code
* Memory leak fix in response_t
* Rename of response_t to obix_request_t
* Improvements to obix_request_t interface
* Added support for node deletion

Building
* Updates to specfile and CMakeLists for Fedora packaging
* Additional compiler flag for errors

Misc
* Documentation updates
* Updated test scripts, example devices