C++ Basics 0.4.0

Release fourth module of the course: "Standard Template Library".

What's Changed

• Module 4 "Standard Template Library" by @boruno in #24
• Framework lesson in module 3 updated with new tasks by @boruno in #55

Bug fixes

• Fix typo by @kochaika in #66
• Fix typo in initBackrground by @antimech in #71
• Add missing unsigned char type to SizeOf by @antimech in #72
• Fix of issue #73 by @boruno in #79