[BUGFIX] Catch exception when folder doesn't exist

Resolves: #3
[FEATURE] Add redirect to login feature

Added option to redirect user to login page if he isn't
authorised when trying to access a file.

Example config to enable this:
$GLOBALS['TYPO3_CONF_VARS']['EXTCONF']['fal_securedownload']['login_redirect_url']
= '/login/?redirect_url=###REQUEST_URI###';
[TASK] Updated version to 0.0.4
[TASK] Show secured files in BE without FE login
[RELEASE] Version 0.0.4
[TASK] Remove BE_USER check in normal FileDumpHook

In eID the BE_USER is never present
[TASK] Added no_access_redirect_url option
[BUGFIX] Secure download in BE context

ResourceStorage::dumpFileContents() uses ob_clean() and this needs
a ob_start() call.
[REALEASE] Updated to version 0.0.6
Merge remote-tracking branch 'upstream/master'