- ShellManager: Implement import database of caidao
- ShellManager: add menu, "import caidao shell" and "export shell"
- change `ShellManager` class to static class
- ShellManager: Implement import database of altman
- ShellManager: add menu, "import altman shell"
- change `Altman.Util/Data/AccessHelper.cs` and `Altman.Util/Data/SqliteHelper.cs` class to static class
update title to `alpha 2014.12.2`