ENH: doxygen, added missing files (2)

Utilities/Doxygen/Monteverdi2/MainPage.dox

Utilities/Doxygen/OTB/Blox.dox

Utilities/Doxygen/OTB/Geometry.dox

Utilities/Doxygen/OTB/ImageSimilarityMetrics.dox

Utilities/Doxygen/OTB/Iterators.dox

Utilities/Doxygen/OTB/MainPage.dox

Utilities/Doxygen/OTB/Modules.dox

Utilities/Doxygen/OTB/NeighborhoodIterators.dox

Utilities/Doxygen/OTB/Registration.dox

Utilities/Doxygen/OTB/Streaming.dox

Utilities/Doxygen/OTB/Threading.dox