1.0.0rc3

• improved training performance by 10x (again) by trying to generate scrapers for highly similar matches first
• added first pseudo css selectors by implementing nth-child. e.g. div a:nth-child(1)
• added child selector generation, e.g. .user-box > a
• added attribute-based css selectors, e.g. a[itemprop="user"]
• added automated tests for GitHub profile pages
• added lazy hashing for node elements
• extended text matching to also include parent elements that contain the same text
• fixed a bug where searching for values resulted in image dimensions being matched
• fixed a bug where text did not exactly match the sample provided but was selected anyway