Enable skip-non-vietnamese by default

This nice feature should be enabled by default.
implement mouse click detection, fix issue #15
update install doc and deb package with new dependency: python3-xlib
Merge branch 'master' into upd

Conflicts:
	ibus_engine/ibus_engine.py
Distribute python3-xlib along with ibus-bogo-python source code
to avoid trouble with distributions
update install doc, cmakelists to reflect the change
remove python3-xlib dependency in deb package
Add ibus to travis.yml
Add gir1.2-ibus-1.0 to travis.yml
Add branch whitelist to travis.yml
Config travis to use system package
Enable headfull on travis
Add gir1.2-wnck-3.0 to travis.yml
Merge pull request #124 from hainp/master

Add ibus, wnck,... dependencies and fake x11 environment for the travis build. Should fix #122.
Enforce relative import, thus avoid troubles related to linux distributions and python-xlib
Fix import path for local python-xlib
Rename MouseDetect -> MouseDetector class and PEP8 clean up
Refactor, Fix subthread not exiting
Refactor MouseDetector; properly implement observer pattern
Merge pull request #2 from lewtds/cleanup-mouse-detector

Refactor MouseDetector; properly implement observer pattern
fix forget to start
Fix thread hanging issue
use the trick recipe from http://code.activestate.com/recipes/496960/ to solve the problem of thread not exiting
it's exiting!