Add file with How to info

How To.md

+## Installation
+### Install Java
+#### Download link
+https://www.java.com/en/download/
+
+#### How and why to uninstall older versions of Java
+https://www.java.com/en/download/faq/remove_olderversions.xml
+
+### Install Git
+#### Download link
+https://git-scm.com/book/en/v2/Getting-Started-Installing-Git
+
+#### For Windows we reccomend Git for Windows
+https://gitforwindows.org/
+
+### Install Eclipse or Intellij
+#### Intellij download link (download the free community edition)
+https://www.jetbrains.com/idea/download/#section=mac
+
+#### Eclipse for Java download link 
+https://www.eclipse.org/downloads/packages/release/2019-06/r/eclipse-ide-java-developers
+
+## Update the local project credentials to match your Gitlab user.
+1) Open the terminal window and go to your Gitlab project
+2) Update local user email with 'git config --local user.email YOUR_NTNU_USERNAME@stud.ntnu.no'
+3) Update local user password with 'git config --local user.password YOUR_NTNU_PASSWORD'
+4) Update local user username with 'git config --local user.name YOUR_NTNU_USERNAME'
+
+## How to clone video 
+VIDEO: https://vimeo.com/355521976