download directory creation change

download directory is created only if the user doesn't cancel the download process
new version number (1.6.6.20130406)
blacklist original behavior restored

blacklist string items should match the whole URL.
Partial matches should be done using regular expressions.
Merge branch 'master' of https://github.com/websurfer/ImageHost-Grabber.git
Filter Dialog layout modified.

Signed-off-by: Rookie <Thierry@evo-n600.(none)>