Support fuzzy-patch

[GoogleCodeExporter]

If the line numbers given in a unified diff do not match, the patch command 
line program will perform a fuzzy patch and try to find the lines givn in the 
context of the unified diff  near the given line numbers in the original file 
to apply the patch. This is currently not supported.

PS: This is a feature request and no defect.

Original issue reported on code.google.com by [email protected] on 14 Aug 2013 at 9:09