Drop "default stdin" behavior

[valeriangalliat]

• See Change behavior when no src #347 (comment)

[coveralls]

Coverage remained the same at 91.23% when pulling a429d62 on no-default-stdin into 133057d on develop.

[pascalduez]

Cloning comment from #348

I understand that if we ship the current state it won't be possible to reassign the behaviour or $ sassoc later. Removing the stdin feature feels also a bit of a pity at that stage.

Possible solution
Why not shipping 2.0 with no default behavior (print usage infos), and set the stdin to work with - ?
This way we will have more time to think of it and still have to ability to add a default behaviour later.

[valeriangalliat]

Why not shipping 2.0 with no default behavior (print usage infos), and set the stdin to work with - ?

Agreed.

Though, - will not be a "special file" for <src>..., it will really be another way to use SassDoc (and it won't be integrated at all with <src>....

[pascalduez]

Though, - will not be a "special file" for ..., it will really be another way to use SassDoc (and it won't be integrated at all with ....

Yes, definitely. It's really different.
That reminds me when implementing the stdin thing I suggested to trigger it with --stdin.