add bb{cp,FTP,ftpPRO} and lftp

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
Merge branch 'contrib_assemblers_build_debug' of github.com:fgeorgatos/easybuild-easyconfigs into contrib_downloaders_HPC
Merge branch 'develop' of github.com:hpcugent/easybuild-easyconfigs into contrib_downloaders_HPC
fixed bug in the toolchain line, needs to refer to goalf

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
fix issues of bb* data transfer tools

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
Merge pull request #111 from fgeorgatos/contrib_downloaders_HPC

add bb{cp,FTP,ftpPRO} and lftp