remove branch differgence in OpenCL code

Fix on Dockerfile adding build-essential package

remove branch differgences in AMD OpenCl code based on #454

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Update compile_Windows.md - Minor Spelling error

Typo: Obtaning -> Obtaining

fix minor spelling error

On-demand elevation

Add messages


Missing include


1

Link API documentation

Add option to enable web interface from cli

Clearer TLS error

update check sums for version 2.2.0

increase version to 2.2.0

Make sure we are using a steady clock

fix static compile with non gnu compiler

Stop UAC popup for elevated ctx

remove adding compiler flags `-static-...` if compiler is not a gnu compiler

Add altcoin list

for CentOS, do scl without sudo

Update tuning.md

Link windows to anchor

Update CMakeLists.txt

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.

The github online editor is injecting tabs for some reason, fixed them.

Adjust spacing and pathing based on review feedback.

Fix typo in socket.cpp

fix windows compile with CUDA 9.1