Get rid of unnecessary None
Disable Languagetool temporary due to encoding problems
Add corebird project
Cleanup: Use right spelling for Softcatalà

Fixes #68.
Clarify which Python versions do we support

Fixes #43.
Docstrings cleanups

Apply styleguide conventions.
Cleanup: If it is True there is no need to check if it is True
Cleanups: Apply styleguide conventions for comments
Cleanup: Use print as function
Cleanup: Use implicit line continuation

It is cleaner that the backslash.
Cleanups: Cleaner way to set dictionaries
Minor globals cleanup

Make clear how many globals there are, and make them to appear at the
top of the code block.
Cleanups: Just shorten code
SQL cleanup

Use uppercase, span several lines to improve readability, use
implicit line continuation, invert quoting to avoid escaping.
Cleanup: More readable way to generate the results HTML page
Cleanup: Search object should know how to display its search terms

Also the use of properties allows us to have a cleaner code.
Cleanup: Search object should know if it has an invalid search term
Cleanup: Invert quoting to avoid escaping
Cleanups: Indents, whitespace and long lines wrap
Cleanup: Remove unnecessary function