Add setup.py for easy installation and usage

[francisco-dlp]

I have added a setup.py file for easy installation. It enables using tpx3HitParser from anywhere without adding the installation folder to PATH. For that I've slightly changed the package structure and import style.

Example of usage:

tpx3hitparser --raw fDcp_000000.tpx3 -o test.hdf5

I have also updated .gitignore with GitHub's Python one.

[PaulVanSchayck]

Thanks for this PR, and sorry for not getting back to you sooner. You're right, using a proper setup.py is in this day and age a much cleaner way to handle a package like this.

I've got a couple of changes on top of your commits. I'll push those soon.

One question. Is it just a typo, or intentional that you prefer tp3hitparser over tpx3hitparser?

[francisco-dlp]

That was a typo, sorry.

Are you still considering merging this PR?

[PaulVanSchayck]

Yes.. I would. Would you have time to update the PR, and fix the typo?

[francisco-dlp]

Done.