fix(Documentation): single machine clusters have some stats undefined

document that single machine clusters will omit sendBandwidthRate and
sendPkgRate.

Via http://thread.gmane.org/gmane.comp.distributed.etcd/218
fix(server/tls_info): use all certificates in CA file

fixes coreos/etcd#553
Merge pull request #554 from mfischer-zd/tls_fixes

fix(server/tls_info): use all certificates in CA file
Merge pull request #559 from philips/document-missing-stats

fix(Documentation): single machine clusters have some stats undefined
bump(github.com/coreos/raft): cff0a00
Merge pull request #563 from benbjohnson/raft

bump(github.com/coreos/raft): cff0a00
chore(server): add +git to the version

we need to automate this but make sure versions built from git have
+git after the version number.
fix(etcd): get consistent with etcdctl on printing versions

Lets get a bit more consistent in printing the versions:

```
$ ./bin/etcd -version
etcd version 0.3.0+git
$ ./bin/etcdctl -v
etcdctl version 0.3.0+git
```
Merge pull request #565 from philips/cleanup-version

fix(etcd): get consistent with etcdctl on printing versions
chore(test): remove useless node1.etcd dir

It is a directory checked in from an etcd test run in mistake.
Merge pull request #566 from unihorn/3

chore(test): remove useless node1.etcd dir
fix(Documentation/tuning): fix incorrect comment about snapshot
Merge remote-tracking branch 'upstream/master'

* upstream/master:
  fix(Documentation/tuning): fix incorrect comment about snapshot
  chore(test): remove useless node1.etcd dir
  fix(etcd): get consistent with etcdctl on printing versions
  chore(server): add +git to the version
  bump(github.com/coreos/raft): cff0a00
  fix(server/tls_info): use all certificates in CA file
  fix(Documentation): single machine clusters have some stats undefined