[Nepomuk] Auto Indent Queries

[Who Knows]

 I think i have got the auto indent right, please tell if its okay or not so
i will implement it , also do you want me to add it like a button (i.e. like
shorten query), i am posting the links of both a screen-shot and the
pastebin in the post.

Image: http://img819.imageshack.us/i/snapshot1j.png/

 Pastebin: http://paste.kde.org/10675/
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