Co-authored-by: Shawn Hoffman <godisgovernment@gmail.com>

Fixed coding standards issue

CalculateHash return string instead of using char array param

By request from delroth, I changed the name of our Transifex
organization so it's named after the Dolphin project rather than after
him. This broke old links and the .tx/config file.

Not doing so results in the following error :

CMake Error at Externals/cubeb/CMakeLists.txt:30 (message):
  Could not find sanitizers-cmake: run

  	git submodule update --init --recursive

  in base git checkout

As the advice is correct, update readme with the correct command.

Enforce minimum supported versions of GCC and Clang