No need to start the cat process when feeding strings to vdc-manage
Wrote the usage output for the script
Get rid of hard coded stuff in the install demo data script
Fixed typo in the GATEWAY variable initialization
Reworded the GATEWAY variable explanation.
Fixed a spelling error in a comment
Another quick rewording in the usage part of the demo data script
Merge pull request #466 from axsh/bug-demodata-script-hardcoded-network

Bug demodata script hardcoded network