Update fr.po
mmg: search for help in installation path on all OS
MP4 reader: handle Endianess for PCM tracks

Fixes #1078.
Fix spelling mistakes
mkvmerge" adjust option text to usage in cli_parser_c
translations: update list of translatable strings
Translations: add Catalan translation
Translations: enable Catalan translation
Translations: update list of translatable strings
AUTHORS: correct Antoni Bella Pérez' name
mmg: change wording on update check

See #1079.
Translations: update list of translatables & update German translation
HEVC: Fixes for SEI handling in bitstream and CodecPrivate

Fixes #1076,
tests: include test result for case 442 added in 8d32a62
HEVC: Write CodecPrivate::configuration_version = 1
HEVC: add test case for keeping user data

See #1076.
HEVC: Detect IDR_N_LP as keyframes
ChangeLog: update
Translations: update Catalan
Translations: update list of translatables