Add a BUILD_COOKBOOK cmake option to control cookbook build targets

Summary

Add a BUILD_COOKBOOK cmake option to control cookbook build targets

Rationale

In develop branch BUILD_DOCUMENTATION cmake option control the configuration of both Doxygen and Cookbook.

"BUILD_DOCUMENTATION: Build the documentation (Doxygen)." -> Define in an official cmake module (file /usr/share/cmake-3.10/Modules/Documentation.cmake on my system)

Don't think that it is a good idea to use BUILD_DOCUMENTATION to also build to cookbook (different dependencies, different targets)

I've added an advanced option BUILD_COOKBOOOK (off by default) to control the cookbook configuration process.

Should be done also for the software guide to have a similar build process for all the documentation.

Implementation Details

Additional notes

Copyright

The copyright owner is COPYRIGHT OWNER (OR OWNER'S AGENT) and has signed the ORFEO ToolBox Contributor License Agreement.

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Check before merging:

• All discussions are resolved
• At least 2 votes from core developers, no vote.
• The feature branch is (reasonably) up-to-date with the base branch
• Dashboard is green
• Copyright owner has signed the ORFEO ToolBox Contributor License Agreement