FF: localization import issue

- trying to use _( ) was not going smoothly, easiest fix is not to try to localized the default notes
ENH: localize benchmark and start-up first-run wizard
ENH: more localization of wizard.py, handle UTF8 encoding
RF: better localize wizard.py

- use a warning flag, rather than the localized string value of a warning message
FF+RF: fix localized string in wizard.py; simplify search path for poedit

- removed pygettext, msgfmt to avoid needing to specify lots of search paths in poedit
- update .po files but did not change ja_JP search path
RF: clean up a few more .po files
Merge branch 'feature-localization' of https://github.com/jeremygray/psychopy into feature-localization