Tar not cleanly extracted - but doesn't seem to be a problem

Instead of having the installer stop dead in its tracks when the
untarring fails to recognize the EOF (this is something that needs to
be addressed), I now post a warning to that effect, but continue
along.

Here is the trace of a successfull call to the new
--install-globus-online flag

----------------------------------------------
# esg-node --install-globus-online
 Update Available @ http://198.128.245.140/dist/devel/externals/bootstrap/esg-globus
`./esg-globus' -> `./esg-globus.bak'
Fetching file from http://198.128.245.140/dist/devel/externals/bootstrap/esg-globus -to-> ./esg-globus
--2013-02-27 11:08:46--  http://198.128.245.140/dist/devel/externals/bootstrap/esg-globus
Connecting to 198.128.245.140:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 101532 (99K) [text/plain]
Saving to: `./esg-globus'

100%[=========================================================================================================================================================>] 101,532     --.-K/s   in 0.002s

2013-02-27 11:08:46 (51.1 MB/s) - `./esg-globus' saved [101532/101532]

[VERIFIED]
*

    Setting up Globus Online / ESGF integration...

    NOTE: You MUST have created a Globus Online account for
    this node: In order for oAuth to work correctly such that
    the user does not have to link their ESG credential with their
    Globus Online account, this node must have its own account.

        https://www.globusonline.org/SignUp

Continue? [Y/n]
Please enter your Globus Online ID []: blah_blah
Please enter your Globus Online Password []: blah_paswd_blah
/tmp /esg/config
 Hmmm... Could not find local file mkproxy-10-15-2012.tar.gz
Fetching file from http://198.128.245.140/dist/devel/externals/bootstrap/mkproxy-10-15-2012.tar.gz -to-> mkproxy-10-15-2012.tar.gz
--2013-02-27 11:08:52--  http://198.128.245.140/dist/devel/externals/bootstrap/mkproxy-10-15-2012.tar.gz
Connecting to 198.128.245.140:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7877 (7.7K) [application/x-tar]
Saving to: `mkproxy-10-15-2012.tar.gz'

100%[=========================================================================================================================================================>] 7,877       --.-K/s   in 0s

2013-02-27 11:08:52 (69.2 MB/s) - `mkproxy-10-15-2012.tar.gz' saved [7877/7877]

[VERIFIED]

gzip: stdin: unexpected end of file
mkproxy/
mkproxy/get_public_key.py
mkproxy/Makefile
mkproxy/mkproxy.c
mkproxy/README.rst
mkproxy/test_activate.py
tar: Child returned status 1
tar: Error is not recoverable: exiting now
 WARNING: Could not extract Globus Online install script (properly)
gcc -o mkproxy mkproxy.c -lcrypto
`/tmp/mkproxy/mkproxy' -> `/usr/local/bin/mkproxy'
<<<<0>>>>