better cmd script validation on cmd-create

[coderofsalvation]

[sqz@peach/mnt/data/home/sqz] (master) $ echo -e "/bin/bash\necho 'hello bash'" | ssh coderofsalvation@alpha.cmd.io cmd-create hellobash 
Building command...
Command installed
[sqz@peach/mnt/data/home/sqz] (master) $ ssh coderofsalvation@alpha.cmd.io hellobash
invalid reference format

so far i have no idea what that meant, i was just playing.
Maybe the error could say: 'invalid reference format, see https://progrium.github.io/cmd/faq/#invalid-reference-format'
Prolly just stuff for wayyyyy later to focus on :)

[progrium]

• Remove defaults
• Check for #!cmd
• Check for regular #!

Est: <1d