Proposed solution to issue 0000345: Capture inigo error to log or screen (http:/...

Proposed solution to issue 0000345: Capture inigo error to log or screen (http://www.kdenlive.org/mantis/view.php?id=345) - adds some more debugging output, and logs command line arguments and westley content to log file in temporary directory. I believe we need something like this to help out the users that does not get anything rendered. There is no integration with the GUI though, and since I am unable to get avformat to complain, I don't know if all errors are collected. Please note that I reindented the files before committing, and that the commit is much larger than the changes due to this.

svn path=/branches/KDE4/; revision=2810