fix(server): un-nest arg checking

simplify the nesting in AddPeer
Merge pull request #103 from philips/un-nest-add-peer-logic

fix(server): un-nest arg checking
chore(README): add the travis badge lower

the travis badge was located above the title which looked a bit weird,
move it down.
chore(README): add an introduction section to the Overview

Add an introduction to the overview and put a link at the bottom.
feat(README): reorganize assuming someone knows raft

People who find this repo probably already know a bit about raft. So,
lets tell them about the current state of the project, the features that
are implemented and the example projects first.
Merge pull request #104 from philips/cleanup-README

Cleanup readme
chore(README): minor grammar fixes

Reread the README after my PR and caught a few things:

- a Go not an Go
- fixup an incomplete phrase
- simplify a sentence
Merge pull request #105 from philips/minor-grammar-fixes

chore(README): minor grammar fixes
chore(*.go): fix imports for protobuf

Fix all of the imports to move from benbjohnson to goraft. Thanks to Ben
for making this move to a new github org.
fix(misc): update to new URL

move README and Makefile to use the new URL.
Merge pull request #107 from philips/fixup-internal-imports

Fixup internal imports
snapshot should be an API
before remove the node, flush the remove command to the node first
minor fix
Merge pull request #109 from coreos/upstream

Update
conf
merge
add todo
wip/ move write/read to server.go and add test
add connectionstring