Merge branch 'travis' into configure-gdkpixbuf
Add a template file for pkg-config integration
Add new config file libsixel.pc
Rebuild
Merge branch 'configure' into pkg-config-integration
Add new configure option, --with-pkgconfigdir
Update Makefile.am
Rebuild
Merge branch 'pkg-config-integration' into configure
Don't use addition assingment operator in configure, it's an extension
of bash. reported by @ttdoda
Merge branch 'fix-for-non-bash-environment' into develop
Merge branch 'configure' into configure-gdkpixbuf
Continue to configure without pkg-config if GDK_PIXBUF_CFLAGS and
GDK_PIXBUF_LIBS is set
Merge branch 'fix-for-gdkpixbuf-configuration-without-pkgconfig' into develop