use template string as an input for '-t'

[chfw]

we may extend our functionality to support

$export HELLO="world"
$moban -t "{{HELLO}}"

and get moban.output

#133

[chfw]

and support the following form too:

$export HELLO="world"
$moban "{{HELLO}}"

[chfw]

$moban -t "{{HELLO}}" does not look good as it applies dural meaning to '-t'. so would remove such a support but allows moban "{{HELLO}}"

[chfw]

will be delivered in 0.3.8