Return the last request made in axios response

Update follow-redirects dependency

Using the follow-redirects 1.0.0 causes this reported write after end issue: https://github.com/olalonde/follow-redirects/issues/50. It looks like the problem with follow-redirects was fixed in 1.1.0 https://github.com/olalonde/follow-redirects/commit/9eec6f0fb8d1c51dbd9be732ce1e2c794a01b652 but if axios is going to update the dependency it might as well update to the latest version now.

Header names are lower cased by axios Which make sense since the header names are case insensitive.

Update README.md

Adding templates for issues and pull requests

adding sample code to GET images

Removing extra colon in README.md's proxy.auth

Add OPTIONS-method as a shortcut

Updating transformRequest documentation to include FormData

Fixing condition of suppressing DOMException caused by XHR Level 2 Incompatible Browsers

Fixing docs for adapters

Updating test for adapter