Merge tag 'issue1' into develop

issue1
Merge branch 'master' into develop
Merge branch 'develop' of github.com:Terradue/DotNetOgcOwsContext into develop
fixed serialization of element extension

Signed-off-by: Emmanuel Mathot <emmanuel.mathot@gmail.com>
ready to pack 1.0.5

Signed-off-by: Emmanuel Mathot <emmanuel.mathot@gmail.com>
Merge branch 'release/1.0.5'