Features:
- Add tests for _readArchive
[#213](https://github.com/motdotla/node-lambda/pull/213)
- Add tests for event_sources.json
[#214](https://github.com/motdotla/node-lambda/pull/214)
- Add tests for DeadLetterConfig
[#215](https://github.com/motdotla/node-lambda/pull/215)
- Add _readArchive tests called in _archive
[#216](https://github.com/motdotla/node-lambda/pull/216)
- modify badge from png to svg
[#227](https://github.com/motdotla/node-lambda/pull/227)
- ScheduleEvents
[#228](https://github.com/motdotla/node-lambda/pull/228)

Bugfixes:
- Bugfix InvalidParameterValueException is given when createFunction
[#209](https://github.com/motdotla/node-lambda/pull/209)
- Clean unnecessary `else`
[#217](https://github.com/motdotla/node-lambda/pull/217)
- Refactor _eventSourceList
[#218](https://github.com/motdotla/node-lambda/pull/218)
- Clean deploy function
[#220](https://github.com/motdotla/node-lambda/pull/220)
- Fix default value of params.Environment.Variables is null
[#221](https://github.com/motdotla/node-lambda/pull/221)
- Fix to use authenticated `aws` object in main.js
[#225](https://github.com/motdotla/node-lambda/pull/225)
- Changed the format of `event_sources.json`
[#226](https://github.com/motdotla/node-lambda/pull/226)