Bugfix RAM parameter not used

Closes #1526 and #1516

See merge request !32

ApplicationEngine new services

See merge request orfeotoolbox/otb!29

Conflicts:
	Modules/Core/ObjectList/include/otbImageList.h
	Modules/Core/Streaming/include/otbStreamingManager.txx
	Modules/Wrappers/ApplicationEngine/src/otbWrapperOutputImageParameter.cxx

Conflicts:
	Modules/Wrappers/ApplicationEngine/src/CMakeLists.txt

New rules for Merge Request acceptance (PSC meeting 2018-02-22)

See merge request !21

Contrast enhancement corrections

See merge request !18

Fix clang missing override warnings

See merge request !30

Refactor logging for the whole library

Closes #1515

See merge request !20

STY: Change ITK_OVERRIDE for override in whole code (find Modules -type f -exec sed -i 's/ITK_OVERRIDE/override/g' {} +)

DOC: Create a new chapter with extended filenames and environment variables in cookbook. Document all environment variables

BUG: #1526: set DefaultRAM in StreamingManager, AutomaticAdaptativeStreaming is already the default for ImageFileWriter