Dump IPA transcription. Also fix some wrong words

[Tomotz]

• Add option to dump the IPA transcription of the input text instead of creating a wav file.
  This is done when you pass -i to the cli. Input can still be from file/arg, and output is default to screen, but can be set to a file as well.
• When some non-existent words that flite doesn't know how to pronounce, appears in the input (for example wannth), they were replaced by the names of each letter. That both sounded terrible, and was non understandable in the IPA transcription. I changed it to sound and look better (wannth - dʌbəljueɪɛnɛntieɪtʃ->wɑnθ etc.)
• Remove the "fix_ah" function. This function changed all the ʌ sounds into ɑ. This just sounded wrong to me (example ʌv->ɑv)
• Manual fixes to a few words in the lex data file:
  1. Challenge - tʃælədʒ->tʃæləndʒ
  2. Isn't - ɪsnt -> ɪzənt
  3. Suggest - səɡˈdʒɛst->səˈdʒɛst
     note - I did not fix the byte numbers in all the lines after the words I fixed. Not sure if those are important to anything, but since I did the fixes manually, it was to much of a hustle to fix.
• Hacky fix for any word containing Suggest in it (suggestion, suggested, etc.) - apply_model gave them all a wrong g sound, but since changing the model table is very complected (I assume you somehow generate that one automatically) I solved it in a hacky find and replace way

I don't think this pull request will (or even should) be merged as is, but I would love it if I can get some of this stuff into master, and if you can fix all the misspelled words I found in a less hacky way