Bugs on Linux build

[jare8734]

When python2 and python3 are installed, pip install -r requirements.txt attempts to install the requirements with python2. Python3 is needed to install qiskit, so pip3 must be used instead.

Also, might run into an environment error due to permissions, --user at the end can be used to get around this.

The final command needed:
pip3 install -r requirements --user

[jare8734]

Furthermore, the ball has not been triggering a paddle measurement on the Linux build.