libgeda: fix potential memory leaks in Scheme API

Add dynamic contexts and supporting unwind handlers to
g_rc_component_library() and g_rc_component_library_command() functions.
gattrib: Added a convenience header for gettext.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Added source files to POTFILES.in for inclusion of translatable strings.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in f_export.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in g_rc.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in gattrib.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in gtksheet_2_2.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in parsecmd.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_attrib.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_misc.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_object.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_rename.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_sheet_data.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_string_list.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_table.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in s_toplevel.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in x_dialog.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in x_fileselect.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in x_gtksheet.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>
gattrib: Created translatable strings in x_window.c.

Signed-off-by: Bert Timmerman <bert.timmerman@xs4all.nl>