0.20.0 (27-February-2017)

0.20.0

• Feature: Largely improved management of environment variables, declaration in package_info(),
  definition in profiles, in command line, per package, propagation to consumers.
• Feature: New build helpers AutotoolsBuildEnvironment, VisualStudioBuildEnvironment, which
  deprecate ConfigureEnvironment, with much better usage of environment variables
• Feature: New virtualbuildenv generator that will generate a composable environment with build
  information from installed dependencies.
• Feature: New build_id() recipe method that allows to define logic to build once, and package
  multiple times without building. E.g.: build once both debug and release artifacts, then package
  separately.
• Feature: Multi-config packages. Now packages can provide multi-configuration packages, like
  both debug/release artifacts in the same package, with self.cpp_info.debug.libs = [...] syntax.
  Not restricted to debug/release, can be used for other purposes.
• Feature: new conan config command to manage, edit, display conan.conf entries
• Feature: Improvements to CMake build helper, now it has configure() and build() methods
  for common operations.
• Feature: Improvements to SystemPackageTool with detection of installed packages, improved
  implementation, installation of multi-name packages.
• Feature: Unzip with tools.unzip maintaining permissions (Linux, OSX)
• Feature: conan info command now allows profiles too
• Feature: new tools unix_path(), escape_windows_cmd(), run_in_windows_bash(), useful
  for autotools projects in Win/MinGW/Msys
• Feature: new context manager tools.chdir, to temporarily change directory.
• Feature: CMake using CMAKE_SYSTEM_NAME for cross-compiling.
• Feature: Artifactory build-info extraction from traces
• Feature: Attach custom headers to artifacts uploads with an artifacts.properties file.
• Feature: allow and copy symlinks while conan export
• Fix: removing quotes in some cmake variables that were generating incorrect builds
• Fix: providing better error messages for non existing binaries, with links to the docs
• Fix: improved error messages if tools.patch failed
• Fix: adding resdirs to cpp_info propagated information, and cmake variables, for directories
  containing resources and other data.
• Fix: printing error messages if a --build policy doesn't match any package
• Fix: managing VS2017 by tools. Still the manual definition of vs150comntools required.
• Bug fix: crashes when not supported characters were dumped to terminal by logger
• Bug fix: wrong executable path in Visual Studio generator

NOTE: It is important that you upgrade at least to 0.19.3 version if you are using remotes with packages that might be created with 0.20.0 version.