Log Message:
Update ibus-skk to 1.4.2.

Noteworthy changes in version 1.4.2 (2014-09-09)
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 * Migrate to libgee 0.8 from 0.6 (libskk Issue#29).
 * Optimize property registration upon focus change.
 * PageUp/PageDown/Up/Down keys on candidate window now work.
 * Install ibus-setup-skk.desktop.