Lots of Flake8 corrections
Maybe we should change the rule to allow lines of 120 chars. It seems more usable.
Big twitter correction : now it outputs the words in right order...
Allow to search for images on 500px. It doesn't use the official API, but the page result. Less stable, but less API key to possess...
Two engines were necessary for Searchcode because there are to search mode : search for documentation or search for code example. Both use open APIs.
