Merge pull request #1 from blub0hr/master

fixed a bug to make it work with Node.js v0.10.10

Changed wording of response error from "Bad response" to "Unsupported HTTP response"

Updated docs

Added examples to README on how to use default params

Added Client#setParam(), Client#setParams(), Client#getParam(), Client#getParams() and Client#clearParams() for managing default request parameters

Add travis-ci build status to README

FileCache#getFilePath() now generates a SHA1 hash of key and uses it as the file name and also uses the first four characters of the hash to create a subdirectory structure two levels deep to avoid overpopulating a single directory with cache files.

Added FileCache#makeDirs() and FileCache#clear() for recursively creating and deleting directories.

Updated tests to use assert.ifError(err) instead of assert.ok(!err)

Updated `npm test` to use default Mocha reporter.

Changed Client#getCacheKey() to return URL string instead of hash.

Removed `npm test` timeout, should default to 2000ms now

Adding .travis.yml

Renamed cache method store() to write().