Squashed 'static-content/dotnet/' changes from 4af3ce5..134fa8c

134fa8c Merge branch 'Documentation' into doc
b965af2 replace Concordion-NET with Concordion.NET and annotate external links
78d3aef change banner image to contain "Concordion.NET" (instead of Concordion-NET)

git-subtree-dir: static-content/dotnet
git-subtree-split: 134fa8ce23229b08361d8ee38b5cedc971afb62d
Merge commit 'b3aaa2686e0e7bbe255eda220bc1614fde32e1b7'