Remove nonspecific rescue blocks.

.delete_subscription and .delete_thread_subscription where wrongly wrapped
with rescue blocks that did not rescue specific exceptions. Tests were updated
to correctly represent normal expected behaviour from the methods.
Document new org repos listing params
Downloads are now deprecated

See https://github.com/blog/1302-goodbye-uploads
Fixed some YARD warnings
Merge pull request #197 from koraktor/fix-yard-warnings

Fixed some YARD warnings
Merge pull request #196 from koraktor/deprecate-downloads

Downloads are now deprecated
Parse creds from .netrc files
Update .travis.yml

Set permissions for .netrc fixture
Set file permissions for .netrc
Look for endpoints in ENV
Release 1.20.0
Fix typo in README
Merge pull request #199 from tricknotes/fix-typo-in-readme

Fix typo in README
Don't bypass SSL verification

Cargo-culting makes @technoweenie sad.
Clean up Gemfile
Wishing the response body was part of Octokit::Error.
Add response_body to Octokit::Error.
Add .repository_network_events

Covers the endpoint to get events from a repository's network.

http://developer.github.com/v3/activity/events/#list-public-events-for-a-network-of-repositories
Add .organization_public_events

http://developer.github.com/v3/activity/events/#list-public-events-for-an-organization
Add .received_public_events(user)

http://developer.github.com/v3/activity/events/#list-public-events-that-a-user-has-received