Lua API changelog

API 2.0 (Marta 0.8)

All new API for handling files and file systems: FileSystem, File and FileInfo instead of VirtualFileSystem, VirtualFile and TargetFile.
All continous IO operations suspend Lua script execution without blocking the UI.
Instead of throwing errors requiring pcall() wrapping, multiple return values are used.
ListModel exposes ListItem (can be a file or a go-up entry).
Tab-related functionality moved from PaneManager to TabManager.
ListModelHandlerDeclaration.directoryChanged() renamed to locationChanged().
ActionRepository renamed to Actions.
ContextMenuItemProviderDeclaration handlers accept ActionContext instead of array of selected files.