v0.4.0 Collect song data on google cloud

• When we retrieve missing information about new songs, that information is also stored on GCS for future data updates

v0.3.1 Added missing message

• Added missing label (Filter > Summary > Flare Rank)

v0.3.0 Supported DDR World

• Retrieve data from DDR World website
• Filter charts by their flare rank
• Sort charts by their flare skill
• Show distribution graph of flare ranks