v0.5.0

Breaking changes:

• specs-go: Renamed the repository from opencontainers/specs to opencontainers/runtime-spec, #365

Additions:

• config: Add 'timeout' for hooks, #346
• config-linux: Add 'maskedPaths' and 'readonlyPaths', #364

Minor fixes and documentation:

• JSON Schema bug-fixes and improved examples, #370
• README: Define "unconditionally compliant", #374
• config: Make Markdown canonical, #342
• config: Explicitly list mapping from symbolic names to UID/GIDs as out-of-scope, #347
• config-linux: Require the runtime mount namespace for namespace 'path' values, #275
• config-linux: Reword kernelTCP docs, #377
• specs-go: Add omitempty to 'Device' and 'Namespace', #340
• .travis.yml: Use built-in 'go vet' and current 'go lint', dropping Go < 1.5, #372, #352
• implementations: Expand ocitools scope to include testing, #328
• style: Move one-sentence-per-line rule from the README, #369
• style: Remove dangling parenthesis, #359
• README: Add a link to the IRC logs, #358
• Fix "manadate", "exmaple", "paramters", and "preferrably" typos, #353, #354