Added oqgraph install in recipe
Added check for install_oqgraph node variable
Added node variables for oqgraph plugin installation
Added platform check for oqgraph script
Added oqgraph install scripts for win and unix
Fixed repo install
Moved to platform_family
Removed whitespace
oqgraph install successful
do not install oqgraph by default
Merge pull request #3 from aferre/master

Oqgraph install