docs subfolder created; moved all MD files in docs

Change-Id: I89e02117c9569354567816ec5ba2a5565b79849b
Signed-off-by: Stephane Desneux <stephane.desneux@iot.bzh>

5 files changed, 2771 insertions, 0 deletions

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new file mode 100644
index 0000000..bf3cede
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+++ b/signaling/images/agent-arch.svg
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