Readme refactor (#35)

* Shorten the README.md file

* Added more information and guides

* Typo fix

* Rename sections

docs/COMPILE_FROM_SOURCE.md

@@ -0,0 +1,31 @@
+# Compiling from source code
+## Requirements
+### Python 3 Interpreter
+Latest* version of **Python 3** is needed. Download the matching release for your platform [here](https://www.python.org/downloads/) and install it. If you are a *Windows* user, selecting **Add Python 3 to PATH** option is mandatory.   
+  
+\* *Use Python 3.6.5 if you encounter an issue*
+## Using terminal
+### To open it...
+- On Windows 8/8.1/10: Press the File tab on **Windows Explorer**, click on **Open Windows PowerShell** or **Open Windows Command Prompt** or look for *Command Prompt* or *PowerShell* in *Start Menu*.
+  
+- On Windows 7: Press **WindowsKey+R**, type **cmd** and hit Enter or look for *Command Prompt* or *PowerShell* in *Start Menu*.
+  
+- On Linux: Press **Ctrl+Alt+T** or look for **Terminal** in the programs.
+  
+- On MacOS: Look for an app called **Terminal**.
+  
+### Navigating to the directory where script is downloaded
+Go inside the folder where script.py is located. If you are not familier with changing directories on command-prompt and terminal read *Changing Directories* in [this article](https://lifehacker.com/5633909/who-needs-a-mouse-learn-to-use-the-command-line-for-almost-anything)
+
+## Finding the correct prefix for Python
+Enter these lines to terminal windows until it prints out the version you have downloaded and installed:
+- `python --version`
+- `python3 --version`
+- `python3.7 --version`
+- `python3.6 --version`
+- `py --version`
+- `py -3 --version`
+- `py -3.6 --version`
+- `py -3.7 --version`
+  
+Once you find it, use it at [Using command-line arguments](COMMAND_LINE_ARGUMENTS.md)