tested for unity2019.1 and small improvement on installation

[joanllobera]

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[Sohojoe]

Hi @joanllobera - thanks for this! its great to get a fresh set of eyes on the project and

I have couple of thoughts:

1. unless there is a sepecific need for a new feature, it would be best to keep the unity version to the last LTS (at least while doing the update to latest ml-agents) - we've seen issues between Unity versions with regards to the physics (i.e. it can break the trained models)

2. What about using pip install mlagents==0.5.0 to set the mlagents version?

[joanllobera]

hi,
regarding your thoughts:

1. I agree it is a good idea to stay with the latest LTS, this should mean Unity 2017.4.30, I believe?
   I will do all my tests with this version, until another LTS is released.

2. I tested this install instruction you suggested, it seems to work OK. Maybe it is simpler to do it this way, whatever version of mlagents we finally use

[joanllobera]

sorry, correction,
I will use 2018.4.4, it seems to also be LTS despite not appearing like this in unity hub.