Convert to Absolute_imports. Pep8 whitespace.

[Cabalist]

Hey there!

I am a member of the Boldport Club and just started looking into PcbModE. I really like it so far! :) I made some changes so that the imports are loaded in the Python3 compatible style and cleaned up some whitespace in the code. I realize that it looks like a lot of changes but I mostly just added from __future__ import absolute_import at the top of the file and then updated the import statements. It should all functional identically.

Hint: Add ?w=1 to the URL to see the diff with whitespace ignored. (i.e Cabalist@452f95b?w=1)

I'd like to add some more Python3 compatibility going forward as well if you are open to it.

Thanks!

[saardrimer]

I know that @threebytesfull has been working on a branch (PCBmodE v5) that takes care of Python3 issues. @threebytesfull do you have any feedback on this with regards to your own work?

[threebytesfull]

I've had a look at this - the changes all make sense but I need to merge carefully where I've moved code around... Just realised the time here so I'll have a proper go at that after work tomorrow :)

[JarrettR]

Any movement on this? Looks quite straightforward and a great cleanup
edit whoops, ignore me:
https://github.com/threebytesfull/pcbmode/tree/develop

would be nice if that were merged into mainline soon! I'd be happy to submit better PRs if the codebase saw more active response!

[saardrimer]

Hello @Cabalist! I'm sorry that this has take so long for me to look at. I'm starting work on a new version at branch cinco-master.

Could you direct me to a resource describing 'import loading in a Python3 compatible style'? For Cinco we'll support Python3 #45

May I also request that you issue PRs in smaller chinks so that it's easier for me to review? Also, have a look at CONTRIBUTE.md ;)