Fix to lose a focus when move the focus from the delayed focus-in/out.

Some applications likes google-chrome URL entry could have the delayed
focus-in and focus-out events and ibus fails to get the new focus.

BUG=rhbz#919863, rhbz#1136623

Review URL: https://codereview.appspot.com/7725045
Updated translations.

Updated gu.po kn.po mr.po ta.po te.po

Review URL: https://codereview.appspot.com/151850043
Fix not to SEGV ibus-ui-gtk3 with wrong 'preload-engines' value.

Fedora internal patch could save engines from the result of
'setxkbmap -query' but they do not exist in simple.xml likes
'xkb:cn::chi' while now the current implementation converts
those engines to 'xkb:us::eng'.

BUG=https://code.google.com/p/ibus/issues/detail?id=1744
TEST=ui/gtk3

Review URL: https://codereview.appspot.com/158640043
ibus-setup tries C since en_US.UTF-8 is not installed in Debian by default.

BUG=https://code.google.com/p/ibus/issues/detail?id=1747
TEST=setup

Review URL: https://codereview.appspot.com/166420043
Patch from Osamu Aoki <osamu@debian.org>.
Remove "Release" modifiers key on ibus-setup.

BUG=https://code.google.com/p/ibus/issues/detail?id=1748
TEST=setup

Review URL: https://codereview.appspot.com/167570043
Fixes ibus_engine_update_lookup_table_fast method

gnome shell needs the previous page and next page
to correctly show the page up/down arrows,
send three pages instead of one page.

URL: https://bugzilla.gnome.org/show_bug.cgi?id=703020

BUG=

Review URL: https://codereview.appspot.com/164540045
Patch from Peng Wu <alexepico@gmail.com>.
Fix Debian Packaging Scripts