1.5.0 RC

What's Changed

• Prepare the documentation for 1.5.0 by @fiammybe in #1215
• Updated branch references & readme by @MekDrop in #1223
• Delete htdocs/editors/tinymce directory by @fiammybe in #1273
• Remove openid by @fiammybe in #1274
• align syntax of DB interface and mysql implementation with PDO by @fiammybe in #1287
• prepare for 1.5.0 beta by @fiammybe in #1286
• Fix mailuser by @fiammybe in #1288
• Cleanup all deprecated files and functions in the core by @fiammybe in #1320
• Fixes DB interfaces incompatibilies between different PHP versions by @MekDrop in #1321
• Fixes DB crash if DB encoding value is empty by @MekDrop in #1322
• Fix: notice undefined index utf8 in htdocs/install/page_dbsettings.php on line 138 by @MekDrop in #1323
• Remove get_magic_quotes_gpc calls by @MekDrop in #1327
• Cookie hardening by @fiammybe in #1331
• removing files from previous versions that are no longer there by @fiammybe in #1330

Full Changelog: v1.4.4...v1.5.0-rc