descriptors are generated with a custom target called
'generate_descriptors'. It depends on all OTBAPP.txt
So a missing .txt during installation will try to generate txt file.
This make sure all available applications have a valid descriptor.
There is a internal custom target called clean_descr which depends on
otbQgisDescriptor executable. This target re-create an empty directory
set in OTB_INSTALL_DESCR_DIR under OTB_BINARY_DIR. This make sure every
execution of generate_descriptor target is a clean one.

Finally, custom target is executed by make install using cmake's
install(CODE. Users can either can "make generate_descriptors" manually
or is automatically called during install.

Packaging install fonts

See merge request !67

COMP: missing parenthesis in packaging script

See merge request !69

MRG: Merge branch '1554-add-wrapper-qgis-to-generate-qgis-descriptors-for-processing-plugin' into develop

MRG: Merge branch 'develop' into 1554-add-wrapper-qgis-to-generate-qgis-descriptors-for-processing-plugin

DOC: Complex types from MR !12 are not listed in cli help

See merge request !56

ENH: Support Geopackage OGR driver

See merge request !61

Resolve "General log information appear several time in composite applications"

Closes #1561

See merge request !58

Resolve "Mention CCLA and ICLA in Contribute.md"

Closes #1552

See merge request !52

ENH: take into account reviewers comments and add statement about copyright mentions (plus miron spelling fixes)

Command line options for Monteverdi

Closes #1366

See merge request !49

Update contribution guide with a new label (patch)

See merge request !55