Now django_evolution is added for solving database modification problem.
admin media directory is changed.
file upload feature is added.
Merge pull request #1 from bosung/master

sign-in page is modified
File upload, download is added.
home is modified
Merge pull request #2 from tgisaturday/master

main page is changed
list main base css change
Merge pull request #3 from dimitree/master

base list main css change
comment's model is modified.
Merge remote-tracking branch 'upstream/master'
migration tool is changed to South
sh is making changes.
conflicts are solved.
Merge pull request #4 from shpark006/master

app itemPage is created.
achievements is added.
Merge remote-tracking branch 'upstream/master'
bug is fixed.
itempage urls, views, templates are modified
google calendar is added.