[Cadencii] Rename OtoArgs and UtauVoiceDB
[core] Add TextReaderUtil
[CadenciiTest] Add UtauVoiceDBTest
[Cadencii] Add utau/Oto.cs
[Cadencii] Modify AppManager.cs; update encoding-name
[Cadencii] Add utau/PrefixMap.cs
[CadenciiTest] Rename UtauVoiceDBTest
[CadenciiTest] Rename VsqIDTest.cs
[Cadencii] Design change: add 'note_number' argment to UtauVoiceDB::attachFileNameFromLyric
[Cadencii] Add 'db_root_directory' argument to Oto::ctor
[Cadencii] Modify UtauVoiceDB; parse prefix.map, and oto.ini in sub directories
Update vConnect submodule revison
Merge branch 'feature/support_prefixmap_in_utaudb' into develop