Switch to Using Modern C++ Classes

[dinomight]

I noticed a lot of raw pointer usages throughout the examples. I wanted to go through and fix it up to use unique_ptr and shared_ptr where appropriate. Would there be any objections to that? What about using some of the more modern language versions like C++14/17/20? Newer compilers don't support the C++11 flag anymore and default to C++14 considering the C++11 standard is now 10 years old. Is there any minimum compiler requirements being targeted by these examples?