cannot run browser on python 3.5.3 -- update docs

[keylime-unicorn]

Issue and Steps to Reproduce

Trying to run ./TerminusBrowser.py with python 3.5.3 gives the following error message:

$ ./TerminusBrowser.py Traceback (most recent call last):  File "./TerminusBrowser.py", line 14, in <module>    from Views.viewClass import View  File "src/Views/viewClass.py", line 4, in <module>    from Frames.defaultFrame import DefaultFrame  File "src/Frames/defaultFrame.py", line 9    self.footerStringRight = f''

Version

Python 3.5.3

[anselmos]

The issue @camicarballo found states that source-code of TerminusBrowser is using f-strings that are introduced at python 3.6.

I've gone a step forward and created dockerfile that makes it easier to check this issue:

FROM python:3.5.3

RUN git clone https://github.com/wtheisen/TerminusBrowser.git
RUN cd TerminusBrowser && pip3 install -r requirements.txt
RUN cd TerminusBrowser && ./TerminusBrowser.py

Dockerfile.txt