Merge pull request #6 from prabhakarlad/master

Add support for libcli, libnet and liburcu
liburcu: minor cleanup to improve readability
Merge pull request #7 from prabhakarlad/master

Added support for netfilter libraries and tools
Fix problem whereby vi soft-linked to itself
connman: Updated to version 1.26
libxml2: Updated to v2.9.2
gnutls: Updated to v3.2.19
Added README
Updated README
wpa_supplicant: Updated to v2.3
connman: Fixed broken systemd service script

The default systemd service script installed by connman breaks with
systemd v217. So we install our own fixed version.
gdb: Updated to version 7.8.1
Added diffutils
Merge branch 'master' of github.com:mini-distribution/cross-opt
Removed gdbm

Moved to cross-core because it is needed by man-db.
atk: Updated to v2.14.0
bluez: Updated to v5.24
connman: Updated URL
hostapd: Updated to v2.3
i2c-tools: Minor cleanup