Update source of travis build icon.
add print function to echo license boilerplate to stdout.  Revised commit
Merge pull request #171 from jhamman/feature/print_version_license

 add print function to echo license boilerplate to stdout
remove log_matric option from image driver
Merge pull request #172 from jhamman/feature/remove_log_matric

remove log_matric option from image driver
Merge branch 'develop' of github.com:UW-Hydro/VIC into feature/logging
Standardized VIC logging.

- Print statements now go to the global FILE stream "LOG_DEST"
- Logging and error handling is controlled via macros in vic_log.h
- All references to vicerror() and nrerror() have been replaced with log_err()