Lots-o-fixes!

Fix bug #2 (Corrupted Downloads) (unlike alexander255 who failed to make compilable code)
Fix bug #15 (File picker doesn't work)
Fix feature request #17 (permanent incognito mode)
Fix feature request #18 (confirmation dialog before downloading file)
Adds ability to redirect JS logs to logcat

Updated version to 1.7.1 (10) and changed changelogs (text&HTML) accordingly