Merge pull request #46 from andymcc/master

Merged automatically by jenkins after successful gate test
Merge pull request #47 from andymcc/master

Merged automatically by jenkins after successful gate test
Merge pull request #48 from andymcc/master

Merged automatically by jenkins after successful gate test
Merge pull request #49 from andymcc/master

Merged automatically by jenkins after successful gate test
added syncdns.py
update readme
Merge pull request #50 from hughsaunders/master

Merged automatically by jenkins after successful gate test