fixed: bundler: explicitly define gem dependencies
improve: introduce Rake::Delphi::EnvVariables.delphi_version class function
improve: tests: use explicitly defined DELPHI_VERSION env var to run tests
improve: introduce RAKE_DELPHI_TRACE env var for debugging purposes
improve: use RAKE_DELPHI_TRACE rather than Rake::Delphi::BasicTask.trace?
refactoring: improve error message when tool detection failed
improve: tests: use predefined .dproj files for different versions of tested Delphi
refactoring: change integer to string
refactoring: change getting versioninfo
refactoring: envvariables: derive from Hash rather than Array
improve: introduce BDSLIB env var

It is equal to $(BDS) + '\Lib'
envvariables: read Delphi overriden env vars from registry
improve: add Delphi RAD Studio 2010 support
fixed: error if no project's .cfg file

Absence of this file is not an error.
fixed: error when no project's .dproj file

Absence of this file is not an error. Just no version info.
improve: add Delphi XE[1-6] support