Sachesi v1.8.3

Changelog:
Validates links before downloading
Move 'Download Device' next to Download/Grab Links button.
Change 'Search Device' and 'Download Device' to 'Search For' and 'Download For'
Only check files that haven't already been downloaded and notify of this status in the results.
Save results (text files) to current directory instead of desktop.
Mac is back

Blackberry release is attached but it's not very usable because of UI layout issues (at least on my Q10). Please use v1.4.0 instead.
Waiting for better Qt5 support in Blackberry.