Prepare 0.3.4 release

* Install chinese locale correctly
* Adjust Debian changelog
* Remove QDebug include

# Please enter the commit message for your changes. Lines starting
# with '#' will be ignored, and an empty message aborts the commit.
# On branch master
# Changes to be committed:
#   (use "git reset HEAD <file>..." to unstage)
#
#	modified:   debian/changelog
#	renamed:    src/help_zh.htm -> src/help_zh.html
#	modified:   src/mainwindow.cpp
#	modified:   src/resources.qrc
#	modified:   src/src.pro
#
# Untracked files:
#   (use "git add <file>..." to include in what will be committed)
#
#	debian/files
#	debian/qcpufreq.debhelper.log
#	debian/qcpufreq.substvars
#	debian/qcpufreq.tarlist
#	debian/qcpufreq/
#	src/src.pro.user
