Add LinBox package
Specify GMP and GIVARO
Add Givaro
Add Givaro
Specify GMP explicitly
Add and use fflas-ffpack
Use _
fflas_ffpack: fix the tarball to work with <#>

This is a workaround for https://github.com/hashdist/hashdist/issues/234.
Add GSL
Merge pull request #239 from hashdist/linbox

Add Linbox and deps