read from formant.txt files based on config.txt

formant.txt files now do not all have to have the same exact format.
You can have extra columns, rearrange the columns etc. Just define the
name of the relevant column for each variable in config.txt as:
VARIABLE : column name   # note

Note: don’t change the VARIABLE

config.txt

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+ARPABET : vowel 		# arpabet vowel token (with or without stress)
+STRESS : stress			# vowel stress (1 = primary, 2 = secondary, 0 = no stress)
+WORD : word 			# word in which the vowel occurs (orthography)
+INDEX : index			# index of the vowel in the word (ex. in ['W','ER1','D'] the vowel has an index of 1) 
+F1 : F1				# first formant
+F2 : F2				# second formant
+TIME : t			# time in the sound file at which the formants were measured (seconds)
+WORD PRONUNCIATION : allPhones 	# arpabet pronunciation of the whole word (as a python list ex. ['W','ER1','D'])
+MAX FORMANTS : nFormants 	# the maximum number of formants setting when the F1 and F2 were measured
+BEGINNING : beg 		# time in the sound file the vowel starts at (seconds)
+END : end			# time in the sound file (seconds)
+## everything below this is optional but some options will be limited if they are not implemented
+## Note that all the duration measurements (F1@20% etc.) must all be given or none 
+F1@20% : F1@20% 		# F1 value (Hz) at 20% of the vowel duration 
+F2@20% : F2@20% 		# F2 value (Hz) at 20% of the vowel duration
+F1@35% : F1@35%			# F1 value (Hz) at 35% of the vowel duration
+F2@35% : F2@35% 		# F2 value (Hz) at 35% of the vowel duration
+F1@50% : F1@50% 		# F1 value (Hz) at 50% of the vowel duration
+F2@50% : F2@50% 		# F2 value (Hz) at 50% of the vowel duration
+F1@65% : F1@65% 		# F1 value (Hz) at 65% of the vowel duration
+F2@65% : F2@65% 		# F2 value (Hz) at 65% of the vowel duration
+F1@80% : F1@80% 		# F1 value (Hz) at 80% of the vowel duration
+F2@80% : F2@80% 		# F2 value (Hz) at 80% of the vowel duration
+DURATION : dur 			# duration of the vowel (seconds) 
+PRECEDING PHONE : pPhone 	# preceding arpabet phone  
+FOLLOWING PHONE : fPhone 	# following arpabet phone
+CELEX : 			# celex vowel token (optional - this will be automatically generated otherwise) 
+ALT MEASUREMENTS : poles 	# lists of formant measurements at 3,4,5,6 maximum formants (ex. [F1@3,F2@3][F1@4,F2@4][F1@5,F2@5][F1@6,F2@6])