too little introduction to how to run rvic(image)

[longbiao1993]

Bug Reports

I try to run image vic with rvic, no idea to create the netcdf file including which variable for rvic.
rvic website also haven't introduced this. Maybe more detail information should be given to users.

• Version of VIC that you are using (e.g. VIC.5.1RC)
• Name and version of the C compiler you are using
• Operating system
• A description of relevant model settings
• A summary of the bug or error message you are getting

Feature Requests

• Description of feature
• Description of the problem the feature addresses
• Will the proposed feature be backward compatible?
• Will the proposed feature change the science results of VIC?