Log Message:
Update to 1.8.14:

Waf 1.8.14 has been released a few moments ago; it contains the following changes:
* Fixed a regression affecting Visual Studio detection on Python 3 when \ 
--msvc_lazy_autodetect is not provided
* Enabled vala processing on a folder basis with the vala_dir parameter - #1601
* Enabled vala resource processing - #1626

Waf 1.8.13 has been released today; it contains the following changes:
* Exposed the Popen parameters input/timeout to cmd_and_log/exec_command \ 
('timeout' is for Python >= 3.3 though)
* Added 'with_sys_path' to Context.load_tool to use/skip sys.path
* Changed gccdeps so that it handles '..' within paths
* env = conf.env.derive().detach()
* Changed Sun compiler's default shared library flag from -Kpic to -xcode=pic32 \ 
- #1625
* Added bld(rule=, ..., cls_str=, cls_keyword=) for more descriptive outputs - #1598
* Added a lazy Visual Studio detection option --msvc_lazy_autodetect - #1614
* Changed the definition of function tests to prevent warnings with gcc - #1622