[sync] v0.2.7.3
refactor : add abstract class SoloEventBase
fix bug : notify once
fix bug : don't close on set manual reminder
Merge pull request #124 from otiai10/refactor

refactor : add abstract class SoloEventBase
[sync] v0.2.7.4
Merge pull request #125 from otiai10/develop

[sync master] 0.2.7.4