v1.7.0

Added

• ToC to README
• Documentation for overlap option
• Elixir 1.2 to Travis-CI config
• Prevent duplicate job-names at runtime (Kai Faber)

Changed

• ToC markdown
• Default values are now configurable
• Updated all dependencies
• Required Elixir version is now >= 1.2

  Fixed

• Overlap option was not set to jobs
• Incorrect example in README
• Timezone is not configurable at runtime
• Credo warnings
• GenServer restarts when one of the jobs crashes (#82)