Create tech stack docs (techstack.yml and techstack.md)

[stack-file[bot]]

Adding tech stack documentation to allow anyone to easily see what is being used in this repo without digging through config files. Two files are being added: techstack.yml and techstack.md. techstack.yml contains data on all the technologies being used in this repo. techstack.md is a visualization of the YML file and displays the tech stack data in a pretty Markdown file.

💡 Protip: techstack.md contains a comment at the top of the file that the following README snippet (with and without the logos) at the top of the file as a comment:

<--- Readme.md Snippet without images Start --->

Tech Stack

IHTSDO/snomed-owl-toolkit is built on the following main stack:

• Java – Languages
• Spring Framework – Frameworks (Full Stack)
• JUnit – Testing Frameworks
• Log4j – Logging Tools
• SLF4J – Log Management
• Travis CI – Continuous Integration
• Shell – Shells

Full tech stack here

<--- Readme.md Snippet without images End --->

Get the code:

## Tech Stack
IHTSDO/snomed-owl-toolkit is built on the following main stack:

- [Java](https://www.java.com) – Languages
- [Spring Framework](https://spring.io/projects/spring-framework) – Frameworks (Full Stack)
- [JUnit](http://junit.org/) – Testing Frameworks
- [Log4j](https://logging.apache.org/log4j/2.x/) – Logging Tools
- [SLF4J](http://slf4j.org/) – Log Management
- [Travis CI](http://travis-ci.com/) – Continuous Integration
- [Shell](https://en.wikipedia.org/wiki/Shell_script) – Shells

Full tech stack [here](/techstack.md)

---

<--- Readme.md Snippet with images Start --->

Tech Stack

IHTSDO/snomed-owl-toolkit is built on the following main stack:

• Java – Languages
• Spring Framework – Frameworks (Full Stack)
• JUnit – Testing Frameworks
• Log4j – Logging Tools
• SLF4J – Log Management
• Travis CI – Continuous Integration
• Shell – Shells

Full tech stack here

<--- Readme.md Snippet with images End --->

Get the code:

## Tech Stack
IHTSDO/snomed-owl-toolkit is built on the following main stack:

- <img width='25' height='25' src='https://img.stackshare.io/service/995/K85ZWV2F.png' alt='Java'/> [Java](https://www.java.com) – Languages
- <img width='25' height='25' src='https://img.stackshare.io/service/2006/spring-framework-project-logo.png' alt='Spring Framework'/> [Spring Framework](https://spring.io/projects/spring-framework) – Frameworks (Full Stack)
- <img width='25' height='25' src='https://img.stackshare.io/service/2020/874086.png' alt='JUnit'/> [JUnit](http://junit.org/) – Testing Frameworks
- <img width='25' height='25' src='https://img.stackshare.io/service/2804/Coralogix-log4j-integration.jpg' alt='Log4j'/> [Log4j](https://logging.apache.org/log4j/2.x/) – Logging Tools
- <img width='25' height='25' src='https://img.stackshare.io/service/2805/05518ecaa42841e834421e9d6987b04f_400x400.png' alt='SLF4J'/> [SLF4J](http://slf4j.org/) – Log Management
- <img width='25' height='25' src='https://img.stackshare.io/service/460/Lu6cGu0z_400x400.png' alt='Travis CI'/> [Travis CI](http://travis-ci.com/) – Continuous Integration
- <img width='25' height='25' src='https://img.stackshare.io/service/4631/default_c2062d40130562bdc836c13dbca02d318205a962.png' alt='Shell'/> [Shell](https://en.wikipedia.org/wiki/Shell_script) – Shells

Full tech stack [here](/techstack.md)