imp(Binary Names): allows users to override the system determined bin name
imp(Binary Names): allows users to override the system determined bin name

Allows users to use `.bin_name("name")` to override the system
determined name with one of their choosing.

Closes #134

Vinatorul/clap-rs,wezm/clap-rs,daboross/clap-rs,nelsonjchen/clap-rs,Vinatorul/clap-rs,cstorey/clap-rs,kbknapp/clap-rs,Vinatorul/clap-rs,sru/clap-rs,darayus/clap-rs,wezm/clap-rs,cstorey/clap-rs,clap-rs/clap,sru/clap-rs,grossws/clap-rs,nelsonjchen/clap-rs,daboross/clap-rs,clap-rs/clap,darayus/clap-rs,kbknapp/clap-rs,sru/clap-rs,nelsonjchen/clap-rs,clap-rs/clap,cstorey/clap-rs,wezm/clap-rs,darayus/clap-rs,grossws/clap-rs,grossws/clap-rs,daboross/clap-rs