STYLE; fix spelling errors in OTB Documentation

Documentation/Cookbook/README.md

Documentation/Cookbook/Scripts/otbGenerateWrappersRstDoc.py

Documentation/Cookbook/rst/Installation.rst

Documentation/Cookbook/rst/Monteverdi.rst

Documentation/Cookbook/rst/OTB-Applications.rst

Documentation/Cookbook/rst/index.rst

Documentation/Cookbook/rst/recipes/bandmathx.rst

Documentation/Cookbook/rst/recipes/improc.rst

Documentation/Cookbook/rst/recipes/numpy.rst

Documentation/Cookbook/rst/recipes/pleiades.rst

Documentation/Cookbook/rst/recipes/sarprocessing.rst

Documentation/Cookbook/rst/recipes/stereo.rst

Documentation/Latex/fancyhdr.sty

Documentation/Latex/picins.sty

Documentation/SoftwareGuide/Examples/CMakeLists.txt

Documentation/SoftwareGuide/Examples/RunExamples.pl

Documentation/SoftwareGuide/Latex/Applications.tex

Documentation/SoftwareGuide/Latex/Classification.tex

Documentation/SoftwareGuide/Latex/Contribute.tex

Documentation/SoftwareGuide/Latex/DataRepresentation.tex