init db:migrate
Finish static pages
Merge pull request #1 from nhattan/static_pages

Finish static pages
Merge pull request #3 from ngocthoaia1/newbranch

init db:migrate
Add seeds.rb
Merge pull request #4 from nhattan/add_seeds

Add seeds.rb
login-out
Merge pull request #5 from ngocthoaia1/login-out

login-out
Finish courses functions and change model, seeds file
Merge pull request #6 from nhattan/creating-courses

Finish courses functions and change model, seeds file