Switch to use LZMA
Cleanup
WIP for reading compressed files via pipe
Add a couple of conversion-related TODOs
Use the correct length for the comp. suffix.

Formerly we stripped off 3 characters (for old ".gz" approach).  Now we strip
off exactly the correct number of characters based on COMPRESSED_SUFFIX
Update TODO
Send archive output to a log file
Don't start a mapper without at least 1 input file