Merge pull request #109 from realityking/date

Reduce dependency on the Date package.
Change meta endpoint to return CIDR addresses
Merge pull request #108 from realityking/travis

Update Travis configuration.
Merge pull request #110 from mbabker/githubMeta

Change meta endpoint to return CIDR addresses
Merge pull request #100 from realityking/uri

Immuteable is actually spelled immutable.
Use Symfony2's session system.