Remove unused and unnecessary vcr cassette matcher overrides
Remove VCR.turned_off blocks

Removed unnecessary turned off blocks as it is intended to be used
inside test blocks that are tagged with :vcr and make real requests.
These methods are completely stubbed and make no real requests and dont
need any partial vcr recordings.
Merge pull request #446 from octokit/remove-vcr-turned-off-blocks

Remove VCR.turned_off blocks
Release 3.0.0.pre
Revert "Update travis config for Rubygems bug"

This reverts commit 9f069baa279b33e5ad614845ce80a88b7be4b7cc.

Conflicts:
	.travis.yml
Dont print deprecations and preview warnings when OCTOKIT_SILENT is set.

Add octokit_warn wrapper around Kernal#warn.

Add OCTOKIT_SILENT=true to travis env config.
Merge pull request #447 from octokit/no-deprecation-messages-on-ci

Dont print deprecations and preview warnings when OCTOKIT_SILENT is set.
Document OCTOKIT_SILENT in the readme