Merge branch 'hotfix/0.9.1' into develop
Add option to not add books in Title Search

Add an option to not add any of the books in Searching by Title, and does it in a weird way by raising a custom exception.
Start using PyCharm (IntelliJ IDEA)
Rewrite Lookup to use OpenLibrary and its API

After a lot of struggles with poor documentation on the Google Books API and its client, I decided to move to OpenLibrary for now, in the hopes it will work better.  This is the rewrite of the Lookup class to use OpenLibrary.  I have not yet modified the main method or done any testing.
Reformat to be more inline with PEP

I followed some of PyCharm’s suggestions to make my code more inline with PEP style guidelines, and added some additional comments while I was at it.
Finish OpenLibrary implementation

I’ve now made the necessary changes to the main (PyBerry) as well as some changes as required to Lookup and Book to finish implementation of it.  I’ve done some cursory testing, but of course nothing more.
Merge branch 'develop'

* develop:
  Finish OpenLibrary implementation
  Reformat to be more inline with PEP
  Rewrite Lookup to use OpenLibrary and its API
  Start using PyCharm (IntelliJ IDEA)
  Add option to not add books in Title Search