Convert all *Options structs to use pointer for fields and fixup the README and project struct (#66)

* Convert all *Options structs to use pointer for fields, per #29.

* Update README and fix project struct

The `project` struct was the only one that had all pointers, so I reverted that to make things consistent again.

The same goes for the `time.Time` pointers. In some cases the API does not return a time and if the field is not a pointer to `time.Time`, this will generate an error. So to be consistent now all `time.Time` fields are pointer fields.