v0.3

What's Changed

• Fix build issues and most warnings on Windows by @Zitrax in #50
• Make Bitfield more const correct by @Zitrax in #51
• Improvements by @Zitrax in #52
• More tests for ConfigFile by @Zitrax in #53
• Use_config by @Zitrax in #54
• Configurable ports #55 by @Zitrax in #57
• Verify that we only download missing piece #32 by @Zitrax in #58
• Change the initiate_peer_connections default #38 by @Zitrax in #59

Full Changelog: v0.2...v0.3