More i18n changes

Following the Smart i18n changes I started yesterday, today we decided to remove the .mo files from the SVN and make them build during install process.

Here’s the changelog for r814:

* setup.py
- extend class InstallData to add _compile_po_files (generates .mo files while installing)
* locale/zh_CN/LC_MESSAGES/smart.po
- add ‘\n’ to line 2662 to make po compile
* locale/*/LC_MESSAGES/smart.mo
- remove .mo files from svn since they are generated during ‘make install’