Tobia Tesan c3058ad0ee CMD: Fix batch adding of games
This implements the behaviour as discussed in PR926:
https://github.com/scummvm/scummvm/pull/926#discussion_r126132411

Essentially:

[-p <dir>] --add                adds all games in <dir> or working dir
[-p <dir>] --detect             enumerates dectected games with their
ids
[-p <dir>] --game <id> --add    adds just game <id>
2017-08-06 19:14:13 +01:00
..
2017-08-06 19:14:13 +01:00
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