BF: use English strings for internal codes
BF: use reversed-dict to get untranslated menu items
Revert reversed-dict approach
BF: add "set during: Static period" to internal list of update control.
Merge pull request #725 from isolver/master

BF: MovieStim2.seek() fixes
DOC: add notes on Get/SetStringSelection and _choices
Merge pull request #726 from hsogo/master

BF: fix errors in setting a parameter to update during static periods
BF: A mouse with many buttons could have no label for the logging message
BF: warning messages about dropped frames were crippling the MovieStim2
DOCS: info about P4N 2015
BF: fixes to gamma setting and also unsetting when win is deleted

gamma was not being set from the Window object because of the new
attributes system

Also, Window.__del__ was not being called because the openWindows
list kept a reference to it. That needs to be a weak reference.
DOCS: changelog and version bump
FF: openWindwos list now uses weakrefs so be careful to use those during access
Merge pull request #727 from peircej/master

Fixes to Movie2 excessive warnings and also to gamma settings from monitorCenter
Merge branch 'master' of github.com:psychopy/psychopy