Update libraries-and-tools.md

Added a new small c++ library
Documentation: remove "token" from discovery docs

It was a bit confusing how the term "token" was overriden in various ways in this doc. Clean it up by referring to it as a discovery URL.
docs: set snapshot to be true in default configuration

If snapshot is false, it will consume much memory and become rather
slow after several days. Make it on as default.
Update clients-matrix.md
Documentation: fix timeout tuning TOML example

this makes the TOML example for tuning the peer election timeout
consistent with the guide's advice and with the other examples.
Typo fix
Merge pull request #918 from edwardcapriolo/patch-1

Update libraries-and-tools.md
Merge pull request #928 from grossws/patch-1

Typo fixes
Update to Go 1.3.1
Merge pull request #927 from bmatsuo/topic/Documentation/fix-tuning-timeout-toml

Documentation: fix timeout tuning TOML example
Add .dockerignore to avoid including .git in docker build context

.git is currently the biggest directory
docs: clarify tuning timeouts
Merge pull request #923 from unihorn/113

docs: set snapshot to be true in default configuration
Merge pull request #937 from andybons/patch-3

Update to Go 1.3.1
doc:readme.md fix Planning/Roadmap 404
Merge pull request #950 from zxc122333/patch-1

doc:[readme.md] fix Planning/Roadmap 404
Fix Typo in api.md.
Merge pull request #954 from ddysher/master

Fix Typo in api.md.
Adding missing comma to api.md

Invalid json example
Remove an invalid comma from api.md example