PKG: small exception for check on /usr path with libdrm

See merge request orfeotoolbox/otb!84

Resolve "Error during OTB SuperBuild compilation on Ubuntu 16.04"

See merge request orfeotoolbox/otb!82

This reverts commit b963a177.

BUG: #1567: fix compilation with GDAL 2.3.0

See merge request orfeotoolbox/otb!79

Fix installation of GDAL bindings in standalone packages

See merge request orfeotoolbox/otb!78

Resolve "wrong default RGB composition for Pleiades image"

See merge request orfeotoolbox/otb!73

Use OGRSpatialReference class to compare projref

See merge request orfeotoolbox/otb!65

Add new contributors and refer to CONTRBUTING.md in the SG

See merge request orfeotoolbox/otb!60

Resolve : Application can't be launch through monteverdi

See merge request orfeotoolbox/otb!70

DOC: allow the configure step to print detected Qt5 version

See merge request orfeotoolbox/otb!76

Review: "add Wrapper/QGIS to generate qgis descriptors for processing plugin"

See merge request !74

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.

New Itk modules

See merge request !71

Packaging install fonts

See merge request !67

COMP: missing parenthesis in packaging script

See merge request !69