sxls: fix --human-readable output for files smaller than 1K
3rdparty: update nginx to 1.6.0
Add missing sxc_cluster_free() in sxvol
Add missing free in local_to_remote_begin() in fileops.c
Implement aliases functionality (bb# 460)

Add --list option to sxinit that writes down all configured profiles
with cluster names. Add --alias option to sxinit that adds alias name to
be used by client tools.
Merge branch 'sxinitlist' of git+ssh://git.dev.skylable.com/home/git/sx into sxinitlist