Released 1.5.4

Removed g_type_init() calls.
Fixed ibus-engine-anthy --xml without display
Fixed kana_voiced_consonant_no_rule for 'bo'.
Fixed dicts.
Updated symbol.t with Seiza.
Added Era dict.
Updated source files with the latest GPL 2.0.
Imported anthy zipcode.t into ibus-anthy.
Added to check the input purpose for gnome-shell password dialog.
Implemented ISO 14755 with Ctrl+Shift+u in LATIN mode.