0.54.0

• move from gna! to github
• Replace std::auto_ptr with std::unique_ptr.
• Merge pull request #4 from innir/remove-gna-links
• Fix sr #3373: Compiling subtitleeditor-0.52.1 '--disable-nls' fails with '/usr/include/libintl.h' errors : (Peter Levine )
• Fix some spelling errors. (Philip Rinn )
• Fix: setup the default value of do-auto-timing-check in the timing group.
• Fix constructor order
• Fix constructor order and formatting
• Fix bug #25243 : Fix some spelling errors. (Philip Rinn )
• Fix bug #25184 : Fix build with gstreamermm-1.0 1.8.0. (Philip Rinn )
• Fix bug #24949 : Remove deprecated gnome-common variable GNOME2_DIR.
• Fix: Ask for maximize-window instead of window-maximized config key.
• Fix appdata screenshoot
• compile with Wformat-security
• Change homepage links to github (Philip Rinn)
• Change domain of email address to 'free dot fr' (Philip Rinn)
• Build with the flags -Werror=reorder -Werror=float-conversion.