Add basic support for modes: none, new_episodes, once
Clean up new mode configuration phpdoc
Update wording in phpdoc and exception
phpdoc updates for supported modes
Improved 'once' mode support
Add mode validation
Create Storage parent class
Add tests
Moves common storage logic to AbstractStorage class.
Fixes typo.
Merge pull request #72 from php-vcr/request_blocking_support

Request blocking support
Adds release to readme.
* PHPUnit color options outputs the actual characters not colors on Windows.
* Removed and extra closing angle bracket.
* Added function to convert directory separator to that of the OS.
* Initialize the blacklist to have the correct directory separator so that path matching is compatible with Windows.
* When a blacklist path is set, it should now have the correct directory separator on Windows.
* Unit test that use posix_getuid should now be skipped on Windows.
* Use the old way of initializing empty arrays.
* Fixed issues which prevented execution on Windows.
* Skip test when function not available.
* Refactored convertToOsSlash.
* Convert path slashes when checking if a path is white listed.