Patch for /trunk/demo-train-big-model-v1.sh about word2vec HOT 4 OPEN

Thanks, I fixed the second part (the missing download of 
questions-phrases.txt). However, I don't know what the first problem is about - 
this part of the script runs OK for me.

1. Is your shell case-insensitive? Also, does it implicitly add the .tar.gz 
suffix?
You download UMBC-webbase-corpus and extract umbc_webbase_corpus.tar.gz. 

2. The corpus contains two types of files - plain txt (.txt) and parsed files 
(.possf2). I assume you are only interested in the txt files, so you want to 
iterate over these files only.

I just noticed that when downloading 
http://ebiquity.umbc.edu/redirect/to/resource/id/351/UMBC-webbase-corpus 
through my browser I also get umbc_webbase_corpus.tar.gz, as in the script. 
However, when I download it using wget, I get UMBC-webbase-corpus. This might 
explain the difference. And I also noticed you also handle the txt files only, 
so that's cool. 

I get umbc_webbase_corpus.tar.gz when using wget, so the issue must be in 
something else. If more people will have the same problem as you, I may have to 
update the script and give the output file an exact name.