If the englishTranscript.xls is not found, the englishTranscript.xlsx will be used instead
Google sheets supports download to xlsx, so this addition was needed.
Also tested the font tool with Pillows image library (PIL fork) which works ok, and updated README file.
add make rules for output FON and MIX files
Create wrappers for all scripts to check for python 2.7
update module.mk to create FON file, then create the SUBTITLES.MIX file
Remove the intermediate TRE files.
Input is expected to be in sampleInput folder