removed hard-coded environment variables and modified checks at the
top of script
added VT_SURVIVAL environment variable usage/check
Merge branch 'feature/env-var-fixes' into develop
copying this code over from /titan/cancerregulome8/TCGA/scripts/dcc-snapshot-2.alt.py
this list of tumor abbreviations is used by the wget*.sh scripts
changed name and path for *snapshot*.py called from this script
modified to get the list of tumors from the external file tumor_list.txt
Merge branch 'feature/wget-mods' into develop
commented out excessive print statements
modifid parseBestClusFiles to make a call to miscTCGA.fixTCGAbarcode()