This is the main trunk for the Homotopy Type Theory project, see http://homotopytypetheory.org/ You can fork this repository to your own and then be automatically kept up to date on new developments. You can also contribute back into it by sending a pull request. The Coq files contain fancy UTF-8 characters. To input these you have to set up an appropriate input method, see http://coq.inria.fr/cocorico/TeXInputMethodForUnicodeNotations for help on doing so with Emacs and CoqIDE.