C++ Improvement and code library improvement

[vincenzopalazzo]

The actual version of the project it is only an alpha version and contains many many leaks in terms of code style, code managing, and so on!

This issue contains a couple of points that SpyCBlock must be considered to be considered a real alternative in the index bitcoin blockchain.

• Move C++ version to 17 and make smarter the directory management.
• Improve C++ Style and make the code style under the Google line guide with the help of clang-format 🚀 (Developing in this branch).
• Introduce a command line parser, a good choice can be the following project
• Introduce jemalloc to make the malloc operation faster.
• Support of chainstate parsing 🚀 (Develiping in this branch)
• Support Testnet blk parsing 📌.
• Improve Readme file and remove the fancy (:trollface:) readme of version 1.0.0
• Improve the benchmarck and also improve the benchmark description with the ram consumption 📈.
• Remove the actual progress bar and change with a C++ progressbar like this (Maybe)

If you have some suggestions or comment feel free to make a comment below or write me an email you can found my email around my github profile.