tools (utils): improved repository version detection: - getRepositoryData has 2 new option: is_path to give absolute path instead of module name, and save_dir_path to save the repository data in a pickled dictionnary - if "hg" executable doesn't work, a .hg_data dictionnary is checked if present in module root path

Use this module to temporary store files that need to be integrated to other
projects such as Wokkel.

For example, the changeset that introduced this folder adds RSM (XEP-0059)
support to Wokkel. The files in sat.tmp.wokkel are imported over the initial
wokkel files from sat.plugins.__init__.py