Updating Getting Started and Customizing the look and feel.

[biophyser]

I added a line in custom_look to change the html theme to address the root cause of issue #16. I also updated the screenshots on the getting_started and custom_look pages. Also got a doctest error caused by #20 so I changed it back to get the build to work.

[phobson]

Thanks for the PR. Rather than creating new files ("new_basic_screenshot") can you just rewrite the old files? They won't be "new" for very long.

[biophyser]

Sorry, missed that one.

[tacaswell]

@biophyser what version of numpy are you using? The change to the spacing in reprs is a change in a recent version of numpy, would rather leave it to pass with newer version rather than old.

[biophyser]

Yep, you're totally right. I was using numpy 1.13 and doctest failed with numpy 1.14. I reversed the changes in ipython_directive.rst

[tacaswell]

@biophyser Sorry, I did not follow your last comment all the way. I am correct that the way it is now (no change) works with np.1.14?

[biophyser]

Sorry for the confusion @tacaswell. The changes I originally made worked with np 1.13 but not with np 1.14. I pushed a commit earlier today that reversed the changes in the ipython_directive file so it is compatible with np 1.14 now.

[tacaswell]

Thanks @biophyser !