Switch to WebMock for future proofing

Since FakeWeb is aparently deprecated for VCR 3.0 and beyond, switch to
WebMock for future proofing.
Add ask flag to confirm submissions.

Let the user opt in to submission confirmation to avoid accidentally
submitting an assignment.
Merge pull request #67 from Dparker1990/support_ask_flag

Add ask flag to confirm submissions.
Bump version
Provide error message if submission fails.

Fixes kytrinyx/exercism.io#512
Bump version
Adds Clojure, Python and Go extensions to `test_identifiers`
Merge pull request #72 from sgerrand/additional-test-extensions

Adds Clojure, Python and Go extensions to `test_identifiers`
Submit using path rather than filename.

This will allow us to detect which exercise is being submitted. See
kytrinyx/exercism.io#529.
Bump version
Makes #path portable by using File#expand_path
Merge pull request #75 from sgerrand/fixes-broken-travis-ci-build-10349084

Makes #path portable by using File#expand_path
the unsubmit command which uses the DELETE request to talk to the backend
use options[:host] instead of hardcoding
Merge pull request #78 from andrzejkrzywda/unsubmit

the unsubmit command which uses the DELETE request to talk to the backend
Merge pull request #61 from mattdbridges/switch-to-webmock

Switch to WebMock for future proofing
Add open to command line options for visiting http://www.exercism.io
Merge pull request #81 from whatasunnyday/open-exercism-io

Add open to command line options for visiting http://www.exercism.io