Docker support & Kotlin DSL support

• #41. Add Docker wrapper support
• #51. Add Kotlin DSL for build step support

Improved error reporting & handling

Resolved following issues:

• #37 Try to automatically recover from toolchain install failures
• #38 Report errors as build problems
• #39 Cleanup tmp and downloads toolchain directories

Bug fix release

Fixes following issues:

• #35 cargo version fails to parse with 0.18.0
• #34 Reporting doc-test failures is misleading

Rust toolchains support

This release includes following improvements:

• Reporting rustc, cargo, rustup tools in build agent configuration
• Rust toolchain multiplexer (rustup) support #5
• Rust toolchains cleaner to meet build agent free disk space requirement #31
• Status reporting for warning and error messages in build log #32

Test reporter improvements and build steps discovery

0.3.0

Update plugin description

Build log improvements

Brings structured cargo log processor

Initial release

Cargo build steps