Add support for setting target's configuration file by DSL.
Rename sample DSL for fit README.
Fix README.
Fix miss spell.
Add sample DSL.
Add builded message for DSL.
Add Blender::Deployed for recording installed targets at deploy mode.
Remove Blender::Require.
Fix index parser.

The latest version of libevent was not able to be acquired correctly.
Improve use of Condition::Collector