Add macros to check for the GTK version to build against
Check for the GTK version to build against
commander: Add support for GTK3
GeanyGenDoc: Add support for GTK3
WebHelper: Add support for GTK3
Disable plugins that check for a dependency on an incompatible GTK
Mark plugins that don't build on GTK3 as requiring GTK2

Plugin authors should remove or adapt this check when they port their
plugin to work with GTK3.
Updated maintainers file
Addons: Fix system tray icon with Geany 1.23
Merge pull request #86 from b4n/addons/systray-fix

Addons: Fix system tray icon with Geany 1.23
scope - fixed inspect display empty value and default tooltips_fail_action
scope - explanation for "signal `project-before-save' is invalid"
Update of po-files for string freeze of version 1.23
Update of Japanese translation
GeanyMiniScript: Fix I18N setup
GeanyMiniScript: Fix information dialog formatting
GeanyNumberedBookmarks: Fix I18N setup
Markdown: Fix I18N setup
Update of Spanish translation
Markdown: Don't hardcode filename length

Fixes warning about PATH_MAX and is better anyway.