Release Command.IO 0.2.0

Changelogs

0.2.0 - 28/08/13:

0.2.0-a2 - 27/08/13:

• Add native error processing.
• Support multiple type in descriptor.

0.2.0-a - 24/07/13:

• Unification of command descriptor.
• Add custom execution context for command action.
• Add custom error.
• Add internal logger system using color.

Alpha release 0.2.0

v0.2.0-a

Update version number to alpha release.