Updated .gitignore to ignore cache folder
Switched to xetex for better char support. Rewrote program instructions a little.
Don't strip characters. xetex should handle everything.
Improved Wikipedia parsing by using the Search extension as the generator instead, and by using more specific regex patterns.
Escaping LaTeX special chars
Learn about every keyword and not just the longest
Merge pull request #26 from ai14/master

Pull request from master