v0.6.0

What's Changed

• ${VAR} in a config block is read when the program starts (ticket 170) by @codelovesme in #6
• A held application reads its own .env when it starts (ticket 180) by @codelovesme in #7
• A held build names the real .env, through a link by @codelovesme in #8
• Held apps: unset reads as "", no .env bakes (staging found) by @codelovesme in #9

Full Changelog: v0.5.1...v0.6.0