rename tools
consolidaet GPU flag for caffe cli
output INFO from caffe cli to stderr by default
give usage message for caffe cli

- call format
- commands
- flags
rename caffe cli args and revise text
check required caffe cli args
comment caffe cli
consolidate test into caffe cli
fix deprecation warnings
update cli usage in examples
consolidate gpu and device_id args in caffe tool
Merge pull request #872 from shelhamer/caffe-tool

Improve caffe tool