add gnvm.go file
add flag package test source
add flag mode
gnmv cli technology selection
delete flagMode()
add version and install command
add uninstall cli
add use cli
add update cli
add ls cli
add node-version
add config cli
optimize flag
Merge branch 'feature/add-cli-process' into develop
add github.com/pelletier/go-toml config lib
add gnvmrc frame work
add .gnvmrc keys
add gnvm config registry and noderoot
add gnvm config logic
chang config lib to github.com/tsuru/config