Initial checkin of public domain lzma sdk
Made 7zip compile and link with all tools requiring file access, also added HAVE_7ZIP var in qb params
Corrected indentation of 7zip support file to adhere to RA standards
Added commandline 7z support
Added and tested decompression also in win build
Merge pull request #923 from timostrunk/compressed_file_support

Compressed file support