Exctract global vars
Fixed bug that blindly appended params to a url
Merge pull request #40 from SammyK/hotfix-graceful-url-appending

[Bug Fix] Fixed bug that blindly appended params to a url
Quick change for DELETE, PUT methods
Merge pull request #42 from yguedidi/extract-global-vars

[Proposal] Exctract global vars
ETag support
Merge pull request #38 from bartekn/etag-support

ETag support