Merge branch 'release/v0.15' into develop
Add `spring` to accelerate develop.
update
Update
Merge branch 'feature/BuyTwHouse' into feature/add_courses_list
Add course page
Add css style for course list.
Merge branch 'feature/add_courses_list' into develop
Workaround: Make portfolio can link to the destination path
Fix: make the slots align center
Fix: logo link
Format:email only, remove others
Layout:make slot font more large
Remove un-used file
Format:refactor
Merge branch 'feature/add_simple_slot_machine'