bjorn/tiled — pull request #666 by despondentdonkey (2014-05-22 01:41:20+00:00)
Title: Rename tile selection functions and undo command.

Renames the following functions:
```
setTileSelection => setSelectedArea
tileSelection => selectedArea
tileSelectionChanged => selectedAreaChanged
```

I also renamed the undo command ```ChangeSelectedArea``` and renamed the files to ```changeselectedarea```. But I'll remove those if unwanted.