Merge pull request #2 from kim/master

Hide 'close' from Network.Socket, it conflicts with 'close' defined here
Bumping version to 0.2.6
Replacing spaces in user supplied group names
Updating copyright information
Removing unused imports
Preferring qualified imports over explicit function imports due
Bumping version to 0.2.8
Updating maintainer info
Bumping version to 0.2.9
Ensure network byte-order of port number

Fixes issue #3
Remove non-functional gmetric executable