Xmas release

• Unit testing.
• Travis CI.
• Config validation.
• Help messages.
• Request to URL.
• Distinguish Amazon devices in discovery mode.

v0.2.1

Bump version: 0.2.0 → 0.2.1

v0.2.0

Bump version: 0.1.3 → 0.2.0

v0.1.3

Bump version: 0.1.2 → 0.1.3

v0.1.1

0.1.1 version.