[patch] subversion part

[Stephan Diederich]

Hi there,

attached is a patch for subversion_part.cpp.
Problems:
1. Each call to Update/diff through the editor
(right-click->subversion->{Update,Diff}) adds that file to a list
(m_urls), but never removes it. (So the third click updates that file
3 times in a row)
2. It's not possibly to use subversion, if the root-project directory
has no .svn dir. (QMake for example can have subdirectories out of the
root-project.)
The attached patch fixes 1 and 2 (and beautifies one debug output ;).

For kdevelop.org, subversion requirements:
The diff doesn't work with kdesvn io-slave 0.9.3.
0.11.0 works again for me. (can't say anything about the kdesdk-ioslave).

HTH,
Stephan