Move version variable, update console banners

PEP 8 specifies that package version should reside in `package.__version__`.  This commit implements this.  It also introduces a little update to the console banners.

@ralsina, if you have any automated scripts for releasing new versions [like I do](https://github.com/Kwpolska/python-project-template/blob/master/release), update them and merge.  In case you don’t, remember that this moved for the next time you bump the version number and hit Merge.