Updating the dependencies

Adding the random-lib by @ircmaxell to generate better nonces, updating
the project metadata and adding a phpunit configuration file
Updating the example usage information

Adding a directory with actual example files on how to use the library
Adding unit testing

Creating the first unit test file (more to come)
Using a library to generate nonces
Updating the base provider

Adding setters for most user provided parameters
Misc syntax update

Making sure that all true|false|null values are in lowercase letters
Simplifying the access token request logic
Updating the OAuth core logic

Fixing the nonce generator logic
Updating the file metadata

Cleaning up the phpDoc file header and author on all files
Adding initial Travis-CI file
Updating the example files

Removing the simple example files and adding a Silex based app for
testing the library
Updating the dependencies

Adding the development dependencies (Silex)
Merge pull request #2 from rudisimo/feature/enhancements

Library Enhancements