Issue https://drupal.org/node/2164175 by Aonoa: The helper image is now a permanent file and will not disappear after cron runs

Issue https://drupal.org/node/2048921#comment-7832597 by joshi.rohit100: Starter css for the helper is now only loaded where the block is present. This required renaming the starter css file.

Issue https://drupal.org/node/2048921#comment-7769001 by Silbermann: Chatter image is no longer mandatory.

Issue https://drupal.org/node/2048921#comment-7769001 by Silbermann: Got rid of unecessary little_helper_has_permission() function.

Fixed incorrect supplied parameter (an array when it should be a string) for access callback in last commit.

Issue #2 by skek: Changed access argument parameter to access callback parameter for settings page. This will make permissions for this page work correctly.

Issue #2 by skek: Removed unnecessary configuration variables and now using ones that are provided by settings forms.

Issue #2 by skek: Removed the setting of some variables in the install hook as these variables may not be used at all.

Changing image dimension validation method for little helper image from custom validation code to #upload_validators property

Changing file type validation method for little helper image from custom validation code to #upload_validators property