Intel libraries installation

Intel MKL and Intel compiler can be installed from Intel oneAPI Toolkits. Intel MKL is available in oneAPI base Toolkit. Intel compiler is available in oneAPI HPC Toolkit.
For each Toolkit, follow the instructions for Command Line Download to install the online installer.
- For base Toolkit, run
```
$ wget https://registrationcenter-download.intel.com/akdlm/irc_nas/18236/l_BaseKit_p_2021.4.0.3422.sh
$ sudo bash l_BaseKit_p_2021.4.0.3422.sh	
```
  After running the GUI, select Modify to customize the libraries. Math Kernel Library and Integrated Performance Primitives are required for Agora. The others are optional.
- For HPC Toolkit, run
```
$ wget https://registrationcenter-download.intel.com/akdlm/irc_nas/18211/l_HPCKit_p_2021.4.0.3347.sh
$ sudo bash l_HPCKit_p_2021.4.0.3347.sh	
```
  After running the GUI, select Modify to customize the libraries. DPC++/C++ Compiler and C++ Compiler Classic are required for Agora. The others are optional.

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