Support for compressed folder/files.

[ChiNoel-osu]

I plan to use 7z CLI version on this (or SharpZipLib but I want 7z support) but having to extract files everytime might be slow. I could use the following code:
.\7z.exe e .\SevenZip.7z -y -r 1.jpg
But I don't bloody know if the first fie is 1.jpg or 01.jpg or some random file that would break everything.
So unless I come up with some caching method and file detecton things, this feature will be at low-priority.
.\7z.exe l .\SevenZip.7z ←This lists contents of the compressed file.