Add -static flag

[mattnibs]

This commit adds the -static flag which when enabled, forces static type checking on all input files. By default csup and parquet are statically checked- all other file types are dynamic. If the -static flag is enabled the entire file is read and the full type information is gathered. Non-seekable inputs (e.g., /dev/stdin) cannot be statically checked an will return an error -static is enabled.

This commit removes the -samplesize flag.

[philrz]

One small finding: Right now it's possible to invoke -static and -dynamic simultaneously. It looks like -dynamic is "winning" at the moment, but some kind of guard to prevent this might be helpful.

$ echo '{"a": "b"}' > data.json &&
  super -version &&
  super -static -dynamic -c "values foo" data.json

Version: v0.3.0-379-gd55bada8f

error({message:"no such field foo",on:{}})