spellcheck: Fix check for default language if LANG contains UTF-8

g_strndup() copies bytes, not UTF-8 characters.
GeanyMiniScript: make the plugin compile against GTK3
Merge pull request #97 from earshinov/geanyminiscript-gtk3

GeanyMiniScript: make the plugin compile against GTK3
GProject: Fix GTK+3 support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Focus the file view when switching to sidebar using the keyboard

Thanks to Giuseppe Corbelli.
Remove unnecessary assert
Fix box inclusion order
New plugin: Pair Tag Highlighter

The plugin finds and highlights matching opening/closing
HTML tag by clicking or moving cursor inside a tag.
geanyinsertnum - compatibility with gtk+ 3
Extending HACKING-file with some information about e.g. build system (autotools)
Merge pull request #99 from vmkononenko/pairtaghighlighter

New plugin: Pair Tag Highlighter
Adding pairtaghighlighter to MAINTAINERS-file
Adding pairtaghighlighter plugin to list of translatable files
Improve GP_ARG_DISABLE() default to auto inside HACKING
TreeBrowser: Fix GTK+3 support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
GeanyLua: Fix GTK+3 support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
PrettyPrinter: Fix GTK+3 support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
GeanyLipsum: Fix GTK+3 support

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
Signed-off-by: Frank Lanitz <frank@frank.uvena.de>
GeanyLipsum: Ensure whitespace before repeating Lorem Ipsum
Merge pull request #96 from b4n/wip/spellcheck

spellcheck: Fix check for default language if LANG contains UTF-8