updated functions of matplotlib and little more

[ipostuma]

Dear Bastula, I had some problems loading the app with matplotlib > 1.1 and there were some old functions in other libraries that I had to change to make it work.

for me it works well right now !

[bastula]

Thanks for the pull request! I am working on some major changes in https://github.com/dicompyler/dicompyler-core, so once those are done I will take a look at yours as well as the ones from #94.

[chaberb]

It is hard to follow the Pull Request as there is more than 3400 new lines in one commit. Maybe if you could split the changes into different commits it would be easier to review.

I also see that you pushed your *.pyc files (probably by accident). Please, remove them push this action as another commit.

[chaberb]

As I can see, #94 and this PR share some of the changes.

[bastula]

Based on the discussion in #103 it is probably best for the user base for dicompyler to move forward as Python 3 only. Please see the dependencyupdate branch for that work.

Thanks for your pull request.