Bump version to 1.2.1

Bump version to 1.2.0

Merge pull request #44 from vibe-d/fix_stop_listening

Fix HTTPListener.stopListening in multiple-listener scenarios

Fix HTTPListener.stopListening in multiple-listener scenarios.

Update change log.

URLRouter encoding improvements, proxy fix for multiple headers with …

…the same name

Merge pull request #27 from vibe-d/prepare_for_vibed_switch

Prepare for vibe.d switch

Remove dependencies to vibe-d package.

Current state of vibe.d

HTTPServerRequest attribute fixes