Fix max_prediction_explanations explanation (#144)

* Fix `max_prediction_explanations` explanation

* Fix up api version

README.rst

@@ -140,7 +140,7 @@ The following table describes each of the arguments:
  out=<filepath>                       \+         \+     Specifies the file name, and optionally path, to which the results are written. If not specified, the default file name is ``out.csv``, written to the directory containing the script. The value of the output file must be a single .csv file that can be gzipped (extension .gz).
  verbose                              \+         \+     Provides status updates while the script is running. It is recommended that you include this argument to track script execution progress. Silent mode (non-verbose), the default, displays very little output.
  keep_cols=<keep_cols>                \+         \+     Specifies the column names to append to the predictions. Enter as a comma-separated list.
- max_prediction_explanations=<num>    \+         \+     Specifies the number of the top prediction explanations to generate for each prediction. If not specified, the default is ``0``. **Not compatible with api_version** ``api/v1``.
+ max_prediction_explanations=<num>    \+         \+     Specifies the number of the top prediction explanations to generate for each prediction. If not specified, the default is ``0``. **Compatible only with api_version** ``predApi/v1.0``.
  n_samples=<n_samples>                \+         \+     Specifies the number of samples (rows) to use per batch. If not defined, the ``auto_sample`` option is used.
  n_concurrent=<n_concurrent>          \+         \+     Specifies the number of concurrent requests to submit. By default, the script submits four concurrent requests. Set ``<n_concurrent>`` to match the number of cores in the prediction API endpoint.
  create_api_token                     \+         \+     Requests a new API token. To use this option, you must specify the ``password`` argument for this request (not the ``api_token`` argument). Specifying this argument invalidates your existing API token and creates and stores a new token for future prediction requests.