Fixing Bugs in AriaDownloader

1. Coping aria2c.exe to OutputDirectory
2. fixing argument bug in AriaDownloader
3. Making FileWriter sync (and removing async from the test files.
3. Updating NugetDownloader to replace the original NuGet url
Removing unnecessary Aria log creating

It appears that aria2c.exe creates the log itself if it detects the log
does not exist so it redundent to create it
Chaning the configuration

1. Adding IshimottoConfig section
2. Removing the Settings annoing file
3. Removing redundent setting from app.config
4. Fixing bug - updating the LastFetchTime
5. Removing unnecessary methods
6. Setting NuGet Querier to take only he lastest version