Pass options to Inspector's init

Relates to #11 (closed)

This is a possible implementation. The issue arises because options are accepted:

• at the init level of the Inspector
• at the inspect level of the Inspector

Currently, options are only passed to the inspect method of the Inspector, making it impossible to override things like the maximum number of errors (limit is fixed at 1000 by goodtables).

This implementation uses a single options dict and extracts the relevant keys to be passed to the init method.