NEW IN WAF 1.8.4
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* Various improvements in stale.py
* More robust file scanning in Qt processing #1502
* More robust handling of build order implied by hidden dependencies #1506
* Run msvs on Python 3 #1503
* Biber update #1501
* Fixed the Python detection on Windows #1498

NEW IN WAF 1.8.2
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* Removed the modules c_* that were accidentally shipped and break pkg-config tests

NEW IN WAF 1.8.1
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* Re-added compatible option group names from waf 1.7 #1495
* Fixed bld(define='') splitting which was disabled by mistake

NEW IN WAF 1.8.0
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* 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