del fake items
[#007][Eason Liu&Vivi Huang][merge html]
[#007][Eason Liu&Vivi Huang][add promotion event]
    [#007][Eason Liu&Vivi Huang][add promotion event]
[#007][Eason Liu&Vivi Huang][add promotion class]
[#007][Eason Liu&Vivi Huang][merge and del unneed files]
[#007][Eason Liu&Vivi Huang][merge]
Merge branch 'master' of github.com:tw-preschool/letusgo-team-b
[#007][Eason Liu&Vivi Huang][rewrite Promotion Class]
[#007][Eason Liu&Vivi Huang][add new table promotion_items but cannot be realized]