Merge pull request #3 from snudmlab/temp

bug fix & changes in css / contact page
Add Google Analytics
Inject menus using a context processor
Add i18n functions
Update English course descriptions
Update i18n
Update i18n
Merge branch 'master' of github.com:snudmlab/dmlab.snu.ac.kr
Separate zoon description from template
Separate zoon description from template
Merge branch 'master' of github.com:snudmlab/dmlab.snu.ac.kr
Move GA from footer to layout
Change urls from dmlab to dm.snu.ac.kr
menu change
Merge https://github.com/snudm/dm.snu.ac.kr into temp