FR : Translation of 3 last plugins (Heatmap, Diagram Overlay and georeferencer
Merge pull request #14 from tqhien/manual_en_v1.8

FR : Translation of 3 last plugins (Heatmap, Diagram Overlay and georef)
Merge pull request #87 from MarieSilvestre/manual_en_v1.8

Manual en v1.8