GtkWrite Version 0.2.1 - Feature Update & Maintenance Release

v0.2.1 - Feature update and maintenance release. Added display of SourceView detected language in Statusbar and included display of the comment syntax, both single-line, and block comment syntax on the Settings (edit) page, adjusted settings-dialog 50px taller to accommodate the additional information. Added app->langname to hold the string for the current language without the need to call gtk_source_language_get_name() on each statusbar update. Multi-line block comment removal added and adjustment of selection so syntax tags remain within selection bounds.