doc: Update documentations for CMSIS 5.8.0

# CMSIS Version 5

The branch *master* of this GitHub repository contains the CMSIS Version 5.7.0.  The [documentation](http://arm-software.github.io/CMSIS_5/General/html/index.html) is available under http://arm-software.github.io/CMSIS_5/General/html/index.html

The branch *master* of this GitHub repository contains the CMSIS Version 5.8.0.  The [documentation](http://arm-software.github.io/CMSIS_5/General/html/index.html) is available under http://arm-software.github.io/CMSIS_5/General/html/index.html

Use [Issues](https://github.com/ARM-software/CMSIS_5#issues-and-labels) to provide feedback and report problems for CMSIS Version 5. 

 - **7z.exe (7-Zip)** Version: 16.02 (File Archiver)

Using these tools, you can generate on a Windows PC:

 - **CMSIS Software Pack** using the batch file **gen_pack.bat** (located in ./CMSIS/Utilities). This batch file also generates the documentation.

 - **CMSIS Documentation** using the batch file **genDoc.bat** (located in ./CMSIS/Doxygen). 

 - **CMSIS Documentation** using the batch file **gen_doc.sh** (located in ./CMSIS/Doxygen). 

 - **CMSIS Software Pack** using the batch file **gen_pack.sh** (located in ./CMSIS/Utilities).

   The bash script does not generate the documentation. The pre-built libraries for RTX4 and RTX5

   are not included within this repository.

The file ./CMSIS/DoxyGen/How2Doc.txt describes the rules for creating API documentation.

## License

Arm CMSIS is licensed under Apache-2.0.

Arm CMSIS is licensed under Apache 2.0.

## Contributions and Pull Requests

Contributions are accepted under Apache-2.0. Only submit contributions where you have authored all of the code.

Contributions are accepted under Apache 2.0. Only submit contributions where you have authored all of the code.

### Issues and Labels