Issue #512: Add import hook for OpenCV
Add FreeBSD support.
don't fail if chflags is not permitted (usefull on FreeBSD)
link to libthr if on freebsd with thread support
Allow user to override buildin hooks
update credits.txt
update manual re. FreeBSD support
Improve babel support on windows
* global.dat was missing
Pick qt_menu.nib from user-specified QTDIR environment variable
Add hook for countrycode
Add printsupport to plugins
Add: An optional Boolean flag to collect_data_files to allow collection of .py
       files, for use with programs that inspect the filesystem to find the names
       of modules to import.
Add: A hook which includes markdown's hidden extensions imports.
Clarify adding and accessing data files.
Docs: PEP8 cleanup.
      Added documentation for additional parameter.
Per user suggestion put overview of data file access in the prologue, and change "frozen" to "bundled" in most places.
Add: Test for the markdown hook.
Add: Test case for PyQt4.QtWebKit.
Add: Test case and hook to fix failures in loading plugins (QtWebKit) from
       a .ui file.
Fix: Discovery of Django root dir in a subdirectory