Reduce output clutter, especially unpacking output

after
````
C:\Temp>luarocks install luafilesystem
Installing http://luarocks.org/repositories/rocks/luafilesystem-1.6.2-1.src.rock...
Using http://luarocks.org/repositories/rocks/luafilesystem-1.6.2-1.src.rock... switching to 'build' mode
mingw32-gcc -O2 -c -o src/lfs.o -Ic:/users/public/lua/5.1/include/ src/lfs.c
mingw32-gcc -shared -o lfs.dll src/lfs.o c:/users/public/lua/5.1/bin/lua51.dll -lm
Updating manifest for c:\users\public\lua\5.1//lib/luarocks/rocks

luafilesystem 1.6.2-1 is now built and installed in c:\users\public\lua\5.1/

C:\Temp>
````

before;
````
C:\Temp>luarocks install luafilesystem

7-Zip 9.10 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-12-22

Processing archive: C:\Users\Thijs\AppData\Local\Temp\luarocks_luarocks-manifest-http___luarocks.org_repositories_rocks-8933\manifest-5.1.zip

Extracting  manifest-5.1

Everything is Ok

Size:       120975
Compressed: 6171
Installing http://luarocks.org/repositories/rocks/luafilesystem-1.6.2-1.src.rock...
Using http://luarocks.org/repositories/rocks/luafilesystem-1.6.2-1.src.rock... switching to 'build' mode

7-Zip 9.10 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-12-22

Processing archive: C:\Users\Thijs\AppData\Local\Temp\luarocks_luarocks-rock-luafilesystem-1.6.2-1-1386\luafilesystem-1.6.2-1.src.rock

Extracting  luafilesystem-1.6.2-1.rockspec
Extracting  luafilesystem-1.6.2.tar.gz

Everything is Ok

Files: 2
Size:       28569
Compressed: 28661

7-Zip 9.10 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-12-22

Processing archive: luafilesystem-1.6.2.tar.gz

Extracting  luafilesystem-1.6.2.tar

Everything is Ok

Size:       122880
Compressed: 27886

7-Zip 9.10 beta  Copyright (c) 1999-2009 Igor Pavlov  2009-12-22

Processing archive: luafilesystem-1.6.2.tar

Extracting  pax_global_header
Extracting  luafilesystem-1.6.2
Extracting  luafilesystem-1.6.2\Makefile
Extracting  luafilesystem-1.6.2\Makefile.win
Extracting  luafilesystem-1.6.2\README
Extracting  luafilesystem-1.6.2\config
Extracting  luafilesystem-1.6.2\config.win
Extracting  luafilesystem-1.6.2\doc
Extracting  luafilesystem-1.6.2\doc\us
Extracting  luafilesystem-1.6.2\doc\us\examples.html
Extracting  luafilesystem-1.6.2\doc\us\index.html
Extracting  luafilesystem-1.6.2\doc\us\license.html
Extracting  luafilesystem-1.6.2\doc\us\luafilesystem.png
Extracting  luafilesystem-1.6.2\doc\us\manual.html
Extracting  luafilesystem-1.6.2\rockspecs
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.3.0-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.4.0-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.4.0-2.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.4.1-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.4.1rc1-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.4.2-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.5.0-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.6.0-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.6.1-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-1.6.2-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-cvs-1.rockspec
Extracting  luafilesystem-1.6.2\rockspecs\luafilesystem-cvs-2.rockspec
Extracting  luafilesystem-1.6.2\src
Extracting  luafilesystem-1.6.2\src\.gitignore
Extracting  luafilesystem-1.6.2\src\lfs.c
Extracting  luafilesystem-1.6.2\src\lfs.def
Extracting  luafilesystem-1.6.2\src\lfs.h
Extracting  luafilesystem-1.6.2\tests
Extracting  luafilesystem-1.6.2\tests\test.lua
Extracting  luafilesystem-1.6.2\vc6
Extracting  luafilesystem-1.6.2\vc6\lfs.def
Extracting  luafilesystem-1.6.2\vc6\luafilesystem.dsw
Extracting  luafilesystem-1.6.2\vc6\luafilesystem_dll.dsp

Everything is Ok

Folders: 7
Files: 31
Size:       86449
Compressed: 122880
mingw32-gcc -O2 -c -o src/lfs.o -Ic:/users/public/lua/5.1/include/ src/lfs.c
mingw32-gcc -shared -o lfs.dll src/lfs.o c:/users/public/lua/5.1/bin/lua51.dll -lm
Updating manifest for c:\users\public\lua\5.1//lib/luarocks/rocks

luafilesystem 1.6.2-1 is now built and installed in c:\users\public\lua\5.1/

C:\Temp>
````