Monteverdi should use install location as default to find applications
This feature would be appreciated on packagers side (as on Debian). Also, it provide a better integration with QGis.
When building and installing monteverdi, the install location should be used as default to derive the proper 'OTB_APPLICATION_PATH'. Of course, if this environment variable is set, it should override the default. The same mechanism is used for instance with GDAL_DATA.
I guess the same thing can be done for mapla, otbApplicationLauncherCommandLine, otbApplicationLauncherQt, and maybe also the Python wrapping.
Regarding our standalone binaires, we already use the environment variable to specify the OTB_APPLICATION_PATH.