Language handler: Cache language file.

Instead of iterating through whole language file we cache values
into separate arrays and destroy the parser when no longer needed.
Captcha: Fix language file.
YouTube: Fix language file.
Merge.
Core: Event handler: Made EventHandler static class.
Core: Module: Remove unneeded method and add namespace.
Blank module: Add core module class namespace.
Activity tracker: Add core module class namespace.
Affiliates: Add core module class namespace.
Articles: Add core module class namespace.
Backend: Apply changes for Events class.
Callbox: Add core module class namespace.
Captcha: Add core module class namespace.
Chat: Add core module class namespace.
Code project: Add core module class namespace.
Collection: Add core module class namespace.
Comments: Add core module class namespace.
Contact form: Add core module class namespace.
Country list: Add core module class namespace.
Downloads: Add core module class namespace.