Support `{{.}}` on the top level

New Features

• Support {{.}} on the top level ( #38 #40 )

More Information

• bbmustache:data() became to equal to term(), so you should be careful if you were expecting type restrictions.
• When it is passed an invalid data, it raise function_clause in the past, but this is gone.
  • The unsupported_term exception added in 1.7.0 is exist yet.

Others

• Remove code to run tests on R16 ( #39 )