Move many gallery helpers to their new homes. (rename-only commit to be careful with revision histories)

--HG--
rename : modules/gallery/helpers/access.php => modules/gallery/classes/Gallery/Access.php
rename : modules/gallery/helpers/ajax.php => modules/gallery/classes/Gallery/Ajax.php
rename : modules/gallery/helpers/album.php => modules/gallery/classes/Gallery/Album.php
rename : modules/gallery/helpers/auth.php => modules/gallery/classes/Gallery/Auth.php
rename : modules/gallery/helpers/batch.php => modules/gallery/classes/Gallery/Batch.php
rename : modules/gallery/helpers/block_manager.php => modules/gallery/classes/Gallery/BlockManager.php
rename : modules/gallery/helpers/dir.php => modules/gallery/classes/Gallery/Dir.php
rename : modules/gallery/helpers/encoding.php => modules/gallery/classes/Gallery/Encoding.php
rename : modules/gallery/helpers/gallery_graphics.php => modules/gallery/classes/Gallery/GalleryGraphics.php
rename : modules/gallery/helpers/graphics.php => modules/gallery/classes/Gallery/Graphics.php
rename : modules/gallery/helpers/MY_html.php => modules/gallery/classes/Gallery/HTML.php
rename : modules/gallery/helpers/identity.php => modules/gallery/classes/Gallery/Identity.php
rename : modules/gallery/helpers/item.php => modules/gallery/classes/Gallery/Item.php
rename : modules/gallery/helpers/json.php => modules/gallery/classes/Gallery/JSON.php
rename : modules/gallery/helpers/l10n_client.php => modules/gallery/classes/Gallery/L10n/Client.php
rename : modules/gallery/helpers/l10n_scanner.php => modules/gallery/classes/Gallery/L10n/Scanner.php
rename : modules/gallery/helpers/legal_file.php => modules/gallery/classes/Gallery/LegalFile.php
rename : modules/gallery/helpers/locales.php => modules/gallery/classes/Gallery/Locales.php
rename : modules/gallery/helpers/log.php => modules/gallery/classes/Gallery/Log.php
rename : modules/gallery/helpers/message.php => modules/gallery/classes/Gallery/Message.php
rename : modules/gallery/helpers/model_cache.php => modules/gallery/classes/Gallery/ModelCache.php
rename : modules/gallery/helpers/movie.php => modules/gallery/classes/Gallery/Movie.php
rename : modules/gallery/helpers/MY_num.php => modules/gallery/classes/Gallery/Num.php
rename : modules/gallery/helpers/photo.php => modules/gallery/classes/Gallery/Photo.php
rename : modules/gallery/helpers/random.php => modules/gallery/classes/Gallery/Random.php
rename : modules/gallery/helpers/site_status.php => modules/gallery/classes/Gallery/SiteStatus.php
rename : modules/gallery/helpers/system.php => modules/gallery/classes/Gallery/System.php
rename : modules/gallery/helpers/task.php => modules/gallery/classes/Gallery/Task.php
rename : modules/gallery/helpers/upgrade_checker.php => modules/gallery/classes/Gallery/UpgradeChecker.php
rename : modules/gallery/helpers/user_profile.php => modules/gallery/classes/Gallery/UserProfile.php
rename : modules/gallery/helpers/MY_valid.php => modules/gallery/classes/Gallery/Valid.php
rename : modules/gallery/helpers/xml.php => modules/gallery/classes/Gallery/XML.php
Fix class declarations for just-moved helpers.
Add class extensions for just-moved helpers.
Standardize adding newline at end of class extension files (4 were missing it).
Merge pull request #227 from shadlaws/move_gallery_helpers

Move gallery helpers