Move the function __get_file_in_tree at the top level of the progit module
Adjust the fork controller to use the same __get_file_in_tree method
Add method in doc_utils to convert a given content according to the extension of the file containing this content
Adjust the fork controller to display the content of the README file if there is one in the tree
Adjust the requirements since we now also support markdown
Main repo should also get the content of the README file if there is one
Display the content of the README file on the git repo info page and invert place of tree and commits
Style a little bit the content of the README file
Adjust the rst syntax in the README file