Log message:
Downgrade to 1.7.16 until
https://code.google.com/p/waf/issues/detail?id=1495
is fixed.

Log message:
Update to 1.8.0:

NEW IN WAF 1.8.0
----------------
* Python 2.5 is now required
* Removed the Waf cache from the task level, use the netcache system
* Console handling improvements
* Properly-sized progress bar on windows
* Generic configuration tests
* Better unicode handling in scripts and in file names
* Shorter build outputs
* Prevent external static libraries propagation through uselib vars #1320
* LaTeX glossaries #1342 and multibib #1345
* Rst document processing
* Various improvements in the Python detection and processing
* Tons of bugfixes

Log message:
Add basic infrastructure collecting information how to use waf.

Log message:
Import waf-1.7.16 as devel/waf.

Waf is a Python-based framework for configuring, compiling and
installing applications. Here are perhaps the most important features
of Waf:

*   Automatic build order: the build order is computed from input
    and output files, among others
*   Automatic dependencies: tasks to execute are detected by hashing
    files and commands
*   Performance: tasks are executed in parallel automatically, the
    startup time is meant to be fast (separation between configuration
    and build)
*   Flexibility: new commands and tasks can be added very easily
    through subclassing, bottlenecks for specific builds can be
    eliminated through dynamic method replacement
*   Extensibility: though many programming languages and compilers
    are already supported by default, many others are available as
    extensions
*   IDE support: Eclipse, Visual Studio and Xcode project generators
    (waflib/extras/)
*   Documentation: the application is based on a robust model
    documented in The Waf book and in the API docs
*   Python compatibility: cPython 2.4 to 3.4, Jython 2.5, IronPython,
    and Pypy