- remove driver warning
- add link to supported card y the ROCm driver

- remove link to the AMD APP SDK from a share hoster
- update windows/linux documentation

dropbox link is broken

RAM requirement mention in compile_linux

AMD has removed the AMD APP SDK links from the website. The AMD employes in the AMD formum posted links to there Dropbox where the SDK can be downloaded)

Only install if the user doesnt already have the packages installed, no
point in reinstalling everything.

I ran into a problem following these instructions, and this change got me past it.

The command in question enables access to the C++ compiler (puts it on the PATH or something like that).  If you do it with `sudo`, it leaves you at a root shell prompt.  If you then exit that root prompt, to go back to non-root, then g++ is no longer accessible.  If you want to compile as non-root, then you need to do `scl` as non-root.

- add copy of openssl libs to appvoyer CI tests
- update windows compile documentation

- add CMake flag `XMRSTAK_COMPILE` to select `native` or `static` compile
- add new flags to the documentation

- add CUDA and AMD APP SDK dependency to linux compile guide
- add AMD APP SDK dependency to windows compile guide

- add more documentation
- split documentation into different files

- move source code to `src`
- categorize files and move to group folder
- change upper case class files to lower case
- change C++ header to `*.hpp`