added sparse full rlnc encoder to public api
Update github repo URLs
Fix warning in test_mapped_file_sink.cpp
Update NEWS.rst
Merge pull request #113 from steinwurf/update-repo-urls

Update repo urls
merge
Merge pull request #112 from steinwurf/add-sparse-full-rlnc-encoder

added sparse full rlnc encoder to public api
merge