RF: rename _() to _translate() - initial commit

- was getting a name conflict: dependency messing with global _, leading to crash back in the app

#$ find . -name '*.py' | xargs python ~/code/sub_translate.py

#import fileinput, sys, re
#for fpy in sys.argv[1:]:
#  i = 0
#  for line in fileinput.input(fpy, inplace=True):
#    sys.stdout.write(re.sub(r'\b_\(', '_translate(', line))
#    # sys.stdout is redirected to the file
RF: finishing touches (hopefully)
DOC: updated for _translate() instead of _()
Merge remote-tracking branch 'jeremy/rename-_translate-function'

Jeremy was changing the name of the translate function while I was
adding the HSV color option to builder components, sometimes on the same
line

Conflicts:
	psychopy/app/builder/components/_visual.py
	psychopy/app/builder/components/polygon.py
	psychopy/app/builder/components/settings.py