update some sentences.
refactoring.
Merge branch 'design'

Conflicts:
	lgcc_media/templates/account/signin.html
change header menu order.
bugfix: wrong spelling.
Merge branch 'design'
Merge branch 'design'
Merge branch 'master' of https://github.com/ghilbut/lgcodechallenger
Merge branch 'design'

Conflicts:
	lgcc_media/templates/base.html
Merge branch 'master' of https://github.com/ghilbut/lgcodechallenger
update header navigation.
copy design to master. but, original template is not completed. need re development."

Merge branch 'design'

Conflicts:
	lgcc_media/templates/base.html
update header navigation.