Add utils/PostBuildCreateVersionInfo project
[Cadencii] Add UpdateCheckForm
[Cadencii] Modify class 'UpdateInfo', add DonwloadUrl property
[Cadencii] Add 'Check For Updates' menu
[Cadencii] Refactor: use BackgroundWorker to download update information
Merge branch 'develop' into feature/check_update

Conflicts:
	src/Cadencii/Cadencii.csproj
	src/Cadencii/en.po
	src/Cadencii/ja.po
	src/Cadencii/kr.po
	src/Cadencii/ui/main/FormMain.cs
	src/Cadencii/zh-CN.po
	src/Cadencii/zh-TW.po
Merge branch 'feature/check_update' into develop