Updated Assamese translation
Release 3.13.90
Updated Spanish translation
Fix a segfault when loading a file
Release 3.13.91
win32: try to propery create the start menu shortcut
Updated Traditional Chinese translation(Hong Kong and Taiwan)
Do not use non-literal format strings
[osx] Fix notebook padding
[osx] Fix spell checker to user new Gtkosx API
[osx] Prevent Cocoa command line argument parsing for files
[osx] Fix spell check directories on OS X
[osx] No longer support old versions of OS X
[osx] Use GtkApplication features for OS X
[osx] Use traditional menu when not using app menu
[osx] Improve automatic build system for OS X