Compressed file types to scan

[alexmoraess]

Hi team,

About this option :
--scan-zip Scan also .zip extension files. This option may slow down scanning.

Could it be updated to cover .tar, .gz, .tgz and .bz files ?
Unix users are using the scanner as well.

[arykov]

Overlapping #171

[xeraph]

I'll consider this issue only if I have more time and everybody wants it.

[nedjitef]

I too want it and even would implement it, but I won't have the time to do so in the next few days.

[xeraph]

Due to https://stackoverflow.com/questions/15521966/zipinputstream-getnextentry-returns-null-on-some-zip-files issue, I decided to use commons-compress and support tar format.