command/agent: add the StartJoin config options
command/agent: "-join" flag for joining on agent start
Adding webpage on serf security model
changelog: added some missing items
remove security from the roadmap, next release will ship with it
travis: stop building on go 1.1, memberlist requires go 1.2
Merge pull request #43 from hashicorp/f-agent-join

Add "-join" to `serf agent`
website: document the `join` flag
Update CHANGELOG
website: remove config files from roadmap, done
Update CHANGELOG to clarify bug fix
readme: changed Go requirement to 1.2+ due to recent changes in memberlist.
changelog: mention Go 1.2+ requirement when building from source.
Merge pull request #44 from mcroydon/doc-go-12

Mention Go 1.2+ requirement in README and CHANGELOG.
serf: update to new Memberlist delegate interface
serf: adding EventMinTime to filter events
serf: adding ignoreOld flag to join
serf: split coalesce and make use of interface
serf: UserEvent exposes the lamport time
serf: supporting user event coalescing