Allow custom brute force files to be added

[GoogleCodeExporter]

These can already be added by manually adding them to the (install)/dirbuster 
directory
But allowing files to be added via the UI will aid usability.

The plan is to:
* Add an "Add custom brute force file" to the Brute Force options
* Copy any files added to the (home)/dirbuster directory (which will be a new 
one)

Note that we will be using a directory relative to 'home' rather than 'install' 
to reduce the chance of permission failures.

It would also be useful to be able to specify a default file to use.

Original issue reported on code.google.com by psii...@gmail.com on 1 Nov 2011 at 12:31

[GoogleCodeExporter]

Original comment by psii...@gmail.com on 2 Nov 2011 at 8:50

• Changed state: Committed

[GoogleCodeExporter]

Original comment by psii...@gmail.com on 6 Nov 2011 at 11:55

• Changed state: Fixed