2.0
* Refactor the hell out of everything
* DAG building is now driven by tools, not targets
* Fully abstract BuildInfo to pave way for supporting different compilers
* Configuration profiles have been replaced with build types
* All the common configuration options are now global
* Integrate header installation back into library component
* More flexible conditionals
* Binary packages now have their own files, enhancing modularity

1.0
* Tarball component allows custom tarballs (tar_file statement is deprecated)
* Unified header installation (install_headers statement is deprecated)
* Datafile component
* Install component allows installing any files
* Improvements all around
* Use new facilities from underlying libraries
* Internal refactoring
* Various bugfixes

0.9
* First released version